Chemistry Calibration of a Pipet and Acid Titration
|
|
- Lee Ellis
- 5 years ago
- Views:
Transcription
1 Chemistry 3200 Today you are given a chance to brush up on some of the techniques that you will be using during the remainder of the semester. Lab grades will be based on obtaining the correct answer in your analyses. Proper weighing and volumetric techniques are essential for successful completion of the classical methods labs. This lab is designed to help you become thoroughly familiar with the balances, flasks, pipettes, etc. A. Calibration of a Pipet Calibration of a pipet will allow you to develop your technique. Your results are easily checked and a mistake is not as costly as it may be during an analysis. 1. Your instructor will direct you how to clean a 25 ml volumetric pipet. Rinse pipet thoroughly with deionized (DI) water after cleaning. 2. Clean off and dry the outside of a 150 ml Erlenmeyer flask. Dry the inside of the neck of the flask. Seal the flask with Parafilm. 3. Weigh the flask. You will need balance sensitivity of at least 1 milligram. 4. Carefully fill the pipet to the mark with distilled water after measuring the temperature of the water with a thermometer. Deliver the contents into the 150 ml flask taking care not to wet the neck of the flask. Observe all of the rules of pipetting (if you are not sure, ask). DO NOT force out the last drop, merely touch the tip of the pipet to the side of the flask. 5. Weigh the flask and the water. Obtain the weight of water by difference and calculate the volume of the pipet using the temperature corrected density of water. (See Harris, Table 2-7, page 42 for the density of water. 6. Repeat the determination until you get three results that agree within 0.1 %. Calculate the mean and standard deviation of the three measurements and record them in your lab notebook. Divide the standard deviation by the mean and multiply by 100% to determine if your results agree within 0.1 %. Notify your TA if your pipet volume differs by more that 0.1 ml from the stated volume. This procedure should be followed when extremely precise results are required. It will not be necessary to repeat this calibration for most of the titrations that you will perform. Make sure you use your calibrated pipet the rest of the semester. B. Simple Titration - Use of the Buret Titrations are performed by delivering a variable volume of reagent to the unknown solution using a buret. A 50.0 ml buret will be available for titrations. Like the pipet it is a precision tool, and with proper technique, it can be used to deliver various amounts of liquids with a precision of a few parts per thousand ( %). After checking the buret for cleanliness (No droplets adhering to the inside of the glass after a distilled water rinse), rinse with two small volumes (~5 ml) of the solution to be used. Fill to near the zero mark
2 and dispense some of the liquid through the stopcock to purge air bubbles from the tip. After removing the bubbles take an initial reading. You will subtract this initial volume from the final volume after the endpoint has been reached. Errors in both initial and final readings will contribute to the total uncertainty in the volume delivered. The buret should be kept clean when not in use. The tip should not be broken or chipped. If it is chipped, replace the tip. Your instructor will describe the correct way to clean your buret. The same general method used for calibration of your pipet may be used for your buret. It is generally safe to assume that the marked gradations on your buret are accurate but you may wish to check this by calibration when high precision is required. Procedure You will be given a standardized solution of NaOH (~0.1 M check the bottle for the actual concentration). Use your calibrated pipet to add 25.0 ml of this solution into a clean 250 ml volumetric flask. Dilute the contents to the mark with distilled water and mix thoroughly. (What is the concentration of the solution in the flask?) You will use this solution in your buret to titrate an unknown solution of HCl. Be sure to clean your pipet by flushing it several times with DI water. If the pipet has only been in contact with ionic solutions, it is not necessary to clean it with soap. Pipet 25.0 ml of the HCl unknown ( unknown indicates that you do not know the concentration) into a clean 250 ml volumetric flask. Dilute to the mark and mix thoroughly. Pipet 25 ml of the diluted acid into a 250 ml Erlenmeyer flask, add three drops of phenolphthalein indicator and titrate to the endpoint (change from colorless to the first detectable pale pink). The color change should be noticeable over an addition of only 1 drop of titrant. This should be performed three times. Perform blank titrations in exactly the same manner as was used to titrate your unknown. A blank titration includes everything but the actual analyte; therefore, your sample is 25 ml distilled water. The blank titration will tell you how much titrant is necessary for the indicator to change color (normally a few drops). Make sure you subtract the blank titration volume from the analyte titration volume for your unknowns. This is known as the titration error. The relative uncertainty in the volume delivered depends on the actual volume delivered. If only 1.00 ml is delivered the uncertainty might be 1.00 ± 0.03 or 3 % relative error but if ml are delivered the relative error will only be (0.03/50.00) /100 = 0.06 %. For this reason, it is desirable to adjust the concentration of the titrant so that about 20 ml are used in a titration. Report the concentration of HCl unknown (i.e., the original 25 ml) in moles/liter from the known stoichiometry of the acid-base neutralization reaction, the known concentration of the NaOH titrant, and the known dilutions of the HCl solution. Values are to be reported on the Experiment Report Sheets. The lab report for Experiment 1 should include the volume of your 25 ml pipet along with its associated error and the concentration of the HCl solution with its associated error. (See Harris, Chapter 2, for common glassware tolerances, errors.) See Appendix 2 for an example of error analysis calculations.
3 Quant Student Chemistry 3200 Date: Lab Instructor: Quant Student Section: A Unknown Number: F Part A: Calibration of 25 ml pipet Temperature of water: 22 C Correction factor for volumetric calibration at aforementioned temperature: ml/g Grams of water: g g g Volume of water (from temperature corrected density of water): ml ml ml Volume of 25 ml pipet: ml Part B: HCl Titration Concentration of standardized NaOH stock solution: M Concentration of titrant solution: M ml NaOH added (blank corrected): ml ml ml ml NaOH (average + standard deviation): ml Moles HCl in titrated sample: moles Molarity of original HCl sample: M
4 Quant Student Calculation for volume of 25 ml pipet: V 3 = mass H2O (Volume of 1g of H 2 O in ml) Table 2-7 page 42 V 3 = g ml/g = ml V 1 = ml V 2 = ml V Ave = 1/3 (V 1 + V 2 +V 3 ) = ml standard deviation of 3 measurements (Standard deviations are most easily calculated on your calculator or in Excel either is fine.) Calculation for HCl molarity: (Take #1 as the Example) ml NaOH: (Ave Standard Deviation) = 1/3 ( ) = ml Concentration of NaOH titrant: M dil V dil = M conc V conc M dil = / = Keep the largest number of significant figures M dil = Considering the error analysis below Moles HCl in titrated sample: ( L NaOH) ( mol NaOH/L) (1 mol HCl/1 mol NaOH) = mol HCl mol HCl = Considering the error analysis below Concentration of HCl in titrated sample: mol HCl / L = M HCl Molarity of Original HCl sample: M 1 V 1 = M 2 V 2 M 2 = M 1 (V 1 / V 2 ) = M (250 ml / ml) = M HCl M 2 =
5 Quant Student Calculation for error analysis (Include a list the errors and their sources. You may neglect errors that are negligible WITH justification.): (Take #1 as the Example) Sources of error Relative error in pipet = / = Keep one significant digit for errors Relative error in volumetric flask = 0.12/ = Chapter 2 Relative error in molarity of NaOH = / = Relative error in buret = 0.05/25.8 = Chapter 2 Relative error in titration = 0.1/25.8 = Uncertainty in diluted NaOH Errors involved are pipette, volumetric flask and molarity of NaOH errors. The pipet can be neglected because it is one order of magnitude smaller. Relative uncertainty in M dil = ( ) 0.5 = Absolute uncertainty in M dil = = Uncertainty for moles HCl in titrated sample: Errors involved are the buret, titration and molarity of NaOH errors. The molarity error can be neglected due to magnitude. Relative uncertainty in mol HCl [ (0.002) 2 + (0.004) 2 ] 0.5 = Absolute uncertainty in mol HCl = = Molarity of original HCl sample: Errors involved are errors in mol HCl, pipette, volumetric flask and pipette again. The error in the volumetric flask and pipette can be ignored due to magnitude. Relative error in M 2 = Absolute error in M 2 = =
6 Chemistry 3200 Date: Lab Instructor: Section: Unknown Number: Part A: Calibration of 25 ml pipet Temperature of water: Correction factor for volumetric calibration at aforementioned temperature: Grams of water: Volume of water (from temperature corrected density of water): Volume of 25 ml pipet: (%RSD = %) Part B: HCl Titration Concentration of standardized NaOH stock solution: M Concentration of titrant solution: M Volume of NaOH added: Blank titrations: Volume of NaOH (blank corrected, average sd): Moles HCl in titrated sample: Molarity of original HCl sample:
7 Calculation for volume of 25 ml pipet: Calculation for HCl molarity:
8 Calculation for error analysis (Include a list of the errors and their sources). You may neglect errors that are negligible with justification.)
Chemical Reactions: Titrations
1 Chemical Reactions: Titrations ORGANIZATION Mode: laboratory work, work in pairs Grading: lab notes, lab performance (titration accuracy), and post-lab report Safety: goggles, lab coat, closed-toe shoes,
More informationExperiment 10. Acid Base Titration
Experiment 10 Acid Base Titration Definitions: Titration A technique to accurately and precisely measure something, most often acids or bases Acids Most acids are molecules that behave as if they were
More informationMolarity of Acetic Acid in Vinegar A Titration Experiment
Molarity of Acetic Acid in Vinegar A Titration Experiment Introduction Vinegar is prepared commercially in two steps, both requiring microorganisms. The first step is the production of ethyl alcohol, C
More informationEXPERIMENT #8 Acid-Base I: Titration Techniques
EXPERIMENT #8 Acid-Base I: Titration Techniques OBJECTIVES: Dispense a precise volume of a solution with a buret Titrate a known volume of acid solution with a standard solution of base Reach a proper
More informationCHEM Practice to be done before the lab. Experiment 9 Introduction to Volumetric Techniques II. Objectives
1 CHEM 0011 Experiment 9 Introduction to Volumetric Techniques II Objectives 1. To learn the proper technique to use a burette. 2. To learn the proper technique to carry out a titration. 3. To verify the
More informationExperiment #7. Titration of Vinegar
Experiment #7. Titration of Vinegar Goals 1. To determine the mass percent of acetic acid in a solution via titration. 2. To master the technique of titration. Introduction Vinegar is a common household
More informationExperiment: Titration
Experiment: Titration INTRODUCTION In this experiment you will be determining the volume of sodium hydroxide solution of known concentration required to neutralize a known mass of an unknown acid in solution.
More informationTo see how this data can be used, follow the titration of hydrofluoric acid against sodium hydroxide:
Weak Acid Titration v010516 You are encouraged to carefully read the following sections in Tro (3 rd ed.) to prepare for this experiment: Sec 4.8, pp 168-174 (Acid/Base Titrations), Sec 16.4, pp 769-783
More informationLearn to do quantitative titration reactions. Observe the mole ratios of several simple chemical reactions.
CHAPTER 6 Stoichiometry of Reactions in Solution Objectives The objectives of this laboratory are to: Learn to do quantitative titration reactions. Observe the mole ratios of several simple chemical reactions.
More informationTITRATION OF AN ACID WITH A BASE
TITRATION OF AN ACID WITH A BASE 1 NOTE: You are required to view the podcast entitled Use of Burets for Titrations before coming to lab this week. To view the podcast, consisting of eight episodes, go
More information+ H 2 O Equation 1. + NaOH CO 2 Na
Experiment # 5 VINEGAR: AN FDA INVESTIGATION Objective In this experiment, you will play the role of an FDA analytical chemist, You will verify whether a vinegar manufacturer's quality control lab remains
More informationTitration of HCl with Sodium Hydroxide
Titration of HCl with Sodium Hydroxide Lab Report for the Subject of Advanced Chemistry Anon Durongpisitkul, Karis Katekovit, Varun Saketharam,Thanon Thamvorapol, Chanon Anektanasup- January 28, 2017 1
More informationChem 2115 Experiment #7. Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution and the analysis of antacid tablets
Chem 2115 Experiment #7 Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution and the analysis of antacid tablets OBJECTIVE: The goals of this experiment are to learn titration
More informationTRATION: ANALYSIS OF VINE
Experiment 10 Name: 22 Ti TRATION: ANALYSIS OF VINE 31 Ga R In this experiment, you will learn the concept and technique of titration. You will determine the concentration of acetic acid in commercial
More informationCHM111 Lab Titration of Vinegar Grading Rubric
Name Team Name CHM111 Lab Titration of Vinegar Grading Rubric Criteria Points possible Points earned Lab Performance Printed lab handout and rubric was brought to lab 3 Safety and proper waste disposal
More informationPURPOSE: 1. To illustrate an oxidation-reduction titration with potassium permanganate 2. To determine the percent mass of iron in an unknown.
PURPOSE: 1. To illustrate an oxidation-reduction titration with potassium permanganate 2. To determine the percent mass of iron in an unknown. PRINCIPLES: Oxidation and reduction reactions, commonly called
More informationExperiment 20-Acid-Base Titration: Standardization of KOH and Determination of the Molarity and/or Percent Composition of an Acid Solution
Experiment 20-Acid-Base Titration: Standardization of KOH and Determination of the Molarity and/or Percent Composition of an Acid Solution In this experiment, you will determine the molarity and percent
More informationTitration with an Acid and a Base
Skills Practice Titration with an Acid and a Base Titration is a process in which you determine the concentration of a solution by measuring what volume of that solution is needed to react completely with
More informationExperiment 8 and 9 Weak Acids and Bases: Exploring the Nature of Buffers
Experiment 8 and 9 Weak Acids and Bases: Exploring the Nature of Buffers Pre-Laboratory Assignments Reading: Textbook Chapter 16 Chapter 17:1-3 This Laboratory Handout Pre-Laboratory Assignments: Complete
More informationSafety Note: Safety glasses and laboratory coats are required when performing this experiment
The Determination of Hypochlorite in Bleach Reading assignment: Burdge, Chemistry 4 th edition, section 4.6. We will study an example of a redox titration in order to determine the concentration of sodium
More information# 12 ph-titration of Strong Acids with Strong Bases
# 12 ph-titration of Strong Acids with Strong Bases Purpose: A strong acid solution is titrated with a strong base solution. A titration curve is then used to determine the endpoint and find the concentration
More informationChemistry Determination of Mixed Acids
Chemistry 3200 Acid-base titration is one of the most common operations in analytical chemistry. A solution containing an unknown amount of ionizable hydrogen can be titrated with a solution of standard
More informationChem 2115 Experiment #7. Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution, analysis of vinegar & antacid tablets
Chem 2115 Experiment #7 Volumetric Analysis & Consumer Chemistry Standardization of an unknown solution, analysis of vinegar & antacid tablets OBJECTIVE: The goals of this experiment are to learn titration
More informationExperiment 7: ACID-BASE TITRATION: STANDARDIZATION OF A SOLUTION
Experiment 7: ACID-BASE TITRATION: STANDARDIZATION OF A SOLUTION Purpose: Determine molarity of a solution of unknown concentration by performing acid-base titrations Performance Goals: Apply the concepts
More informationTitrations Worksheet and Lab
Titrations Worksheet and Lab Vocabulary 1. Buret: a piece of glassware used for dispensing accurate volumes, generally reads to two places of decimal. 2. Titrant: the substance of known concentration added
More informationAcid-Base Titration. M M V a
Acid-Base Titration Pre-Lab Discussion In the chemistry laboratory, it is sometimes necessary to experimentally determine the concentration of an acid solution or a base solution. A procedure for making
More informationIn this laboratory exercise we will determine the percentage Acetic Acid (CH 3 CO 2 H) in Vinegar.
The titration of Acetic Acid in Vinegar In this laboratory exercise we will determine the percentage Acetic Acid (CH CO H) in Vinegar. We will do this by Titrating the Acetic Acid present with a Strong
More informationCHEM 334 Quantitative Analysis Laboratory
Calibration of Volumetric Glassware Introduction Volumetric glassware is a class of glass vessels that are calibrated to contain or deliver certain volumes of substances. Graduated cylinders, pipettes
More informationNaOH (aq) + HCl (aq) NaCl (aq) + H 2 O (l)
EXPERIMENT 21 Molarity of a Hydrochloric Acid Solution by Titration INTRODUCTION Volumetric analysis is a general term meaning any method in which a volume measurement is the critical operation; however,
More informationAcid-Base Titration Acetic Acid Content of Vinegar
Acid-Base Titration Acetic Acid Content of Vinegar Prelab Assignment Read the entire lab. Write an objective and any hazards associated with this lab in your laboratory notebook. On a separate sheet of
More informationNEUTRALIZATION TITRATION-2 TITRATION OF AN ANTACID (Exp. 4)
Objective NEUTRALIZATION TITRATION-2 TITRATION OF AN ANTACID (Exp. 4) The aim of this experiment is to carry out titration of antacid tablets and to determine acetic acid content of vinegar. a) Titration
More informationTitration of an Unknown Acid
Experiment 6 Titration of an Unknown Acid Prepared by Stephen E. Schullery and Ross Nord, Eastern Michigan University PURPSE To determine the apparent molar mass of an unknown monoprotic acid by titrating
More informationExperiment#1 Beer s Law: Absorption Spectroscopy of Cobalt(II)
: Absorption Spectroscopy of Cobalt(II) OBJECTIVES In successfully completing this lab you will: prepare a stock solution using a volumetric flask; use a UV/Visible spectrometer to measure an absorption
More informationAcid / Base Titrations
Acid / Base Titrations v051413_7pm Objectives: Determine the concentration of a base solution using an acid standard. Optional: Precipitate an ionic salt for percent yield determination using the standardized
More informationEXPERIMENT A7: VINEGAR TITRATION. Learning Outcomes. Introduction. Upon completion of this lab, the student will be able to:
1 Learning Outcomes EXPERIMENT A7: VINEGAR TITRATION Upon completion of this lab, the student will be able to: 1) Prepare a solution of primary standard 2) Determine the molar concentration of a solution
More informationCHM 130 Acid-Base Titration Molarity of Acetic Acid in Vinegar
CHM 130 Acid-Base Titration Molarity of Acetic Acid in Vinegar INTRODUCTION One of the most important techniques for chemical analysis is titration to an equivalence point. To illustrate this procedure,
More informationAcid Base Titration Experiment ACID - BASE TITRATION LAB
ACID - BASE TITRATION LAB MATERIALS and CHEMICALS Burette 50 ml Burette clamp Ring stand Stirring rod Plastic funnel Beakers (50 ml, 100 ml, 400 ml) Graduated cylinder (25 ml, 50 ml) 0.10 M NaOH 0.10 M
More informationH 3 O + (aq) + P 2- (aq)
PURPOSE: To standardize a solution of sodium hydroxide by titration with a primary standard, (KHC 8 H 4 O 4 ), potassium hydrogen phthalate (KHC 8 H 4 O 4 ) PRINCIPLES: Most shelf reagents, such as 0.10
More informationEXPERIMENT 12B: TITRATION OF AN UNKNOWN ACID INTRODUCTION
EXPERIMENT 12B: TITRATION OF AN UNKNOWN ACID INTRODUCTION In this experiment you will determine the molar mass of an unknown acid by titration with the sodium hydroxide you prepared and standardized in
More informationAscorbic Acid Titration of Vitamin C Tablets
Ascorbic Acid Titration of Vitamin C Tablets Part A. Preparation of Vitamin C Tablet Solutions 1. Obtain two vitamin C tablets. Place a plastic weighing boat on the balance, and press zero to tare the
More informationCHEM 132 Lab 11 Western Carolina University
Name Lab Section Chemistry 132 Lab 11 How Effective is Your Antacid? Prelaboratory Exercise 1. How many grams of NaOH will you need to make 250 of 0.5 M NaOH solution? 2. What is the purpose of the first,
More informationPre-lab: Read section 9.9 (pages ) on acid-base titrations in the textbook. Complete the attached pre-lab by Tuesday, June 2.
Chemistry 121 Lab 5: Titration of an unknown acid Objective: Determine the concentration of an unknown monoprotic acid by titration, the process that matches the number of moles of base with the number
More informationExperimental Procedure. Lab 406
Experimental Procedure Lab 406 Overview This experiment is to be complete in cooperation with other chemists/chemist groups in the laboratory. In PART A, a standardized solution of hydrochloric acid is
More informationAccuracy and Precision of Laboratory Glassware: Determining the Density of Water
Accuracy and Precision of Laboratory Glassware: Determining the Density of Water During the semester in the general chemistry lab, you will come into contact with various pieces of laboratory glassware.
More informationAcidity of Beverages Lab
Acidity of Beverages Lab Name: Introduction: Common beverages may be either acidic or basic. Fruit juices, for example, get their sweet taste from sugars and their sour or tart taste from weak acids such
More informationAscorbic Acid Titration of Vitamin C Tablets
Ascorbic Acid Titration of Vitamin C Tablets Introduction This experiment illustrates how titration, the process of slowly adding one solution to another until the reaction between the two is complete,
More informationNOTE: YOU WILL BE USING THIS SOLUTION IN BOTH, THIS EXPERIMENT AND EXP 12B. IF YOU WASTE THE SOLUTION YOU MAY RUN OUT BEFORE YOU HAVE FINISHED EXP 12B
EXPERIMENT 12 A: STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION OBJECTIVE: Sodium hydroxide solution of about 0.2 M is prepared in order to be used in Exp 12B. The solution is then standardized, that is,
More informationExperiment 7: Titration of an Antacid
1 Experiment 7: Titration of an Antacid Objective: In this experiment, you will standardize a solution of base using the analytical technique known as titration. Using this standardized solution, you will
More informationExperiment 20: Analysis of Vinegar. Materials:
Experiment 20: Analysis of Vinegar Materials: graduated cylinder 6 M NaOH: Dilute Sodium Hydroxide 1000 ml Florence Flask & stopper KHC 8 H 4 O 4 : Potassium Hydrogen Phthalate (KHP) 125 ml Erlenmeyer
More informationFor this lab, you will determine the purity of the aspirin by titration and by spectrophotometric analysis.
Introduction: ommercially prepared aspirin tablets are not considered 100% pure acetylsalicylic acid. Most aspirin tablets contain a small amount of binder which helps prevent the tablets from crumbling.
More informationExperiment 5: Determining the Stoichiometry and Products of a Redox Reaction
Experiment 5: Determining the Stoichiometry and Products of a Redox Reaction Reading: Chapter sections 4.4-4.6 and 20.1-20.2 in your course text and this lab handout Ongoing Learning Goals: To use a scientific
More informationCHEM 30A EXPERIMENT 8 & 9: ACID- BASE TITRATION. Learning Outcomes. Introduction. Upon completion of this lab, the student will be able to:
1 Learning Outcomes CHEM 30A EXPERIMENT 8 & 9: ACID- BASE TITRATION Upon completion of this lab, the student will be able to: 1) Prepare a solution of primary standard 2) Determine the molar concentration
More informationUpon completion of this lab, the student will be able to:
1 Learning Outcomes EXPERIMENT 30A7: VINEGAR TITRATION Upon completion of this lab, the student will be able to: 1) Measure the amount of acetic acid in a solution of vinegar Introduction The molar concentration
More informationEXPERIMENT 5 ACID-BASE TITRATION
EXPERIMENT 5 ACID-BASE TITRATION INTRODUCTION Much of chemistry and biology is concerned with the behavior of acids and bases. Acids and bases are participants in many reactions in nature, and many reactions
More informationChemistry 101 Experiment 12B-ANALYSIS OF COMMERCIAL VINEGARS
Vinegar is a solution of acetic acid (HC2H3O2). The strength or concentration of the vinegar is usually given on the label of the bottle in percent by weight or percent acidity. The United States Food
More informationThe reaction between the metal hydroxides and the stomach acid is an acid base reaction very similar to that in the previous experiment:
Experiment 3 Stoichiometry... Solution/Solution Evaluating Commercial Antacid's Lab Owl Announcement Upon completion of this lab go log onto OWL. A Lab Owl section should now appear in your courses and
More informationAscorbic Acid Titration of Vitamin C Tablets
Ascorbic Acid Titration of Vitamin C Tablets Introduction This experiment illustrates how titration, the process of slowly adding one solution to another until the reaction between the two is complete,
More informationName: Date: AP Chemistry. Titrations - Volumetric Analysis. Steps for Solving Titration Problems
Name: Date: AP Chemistry Titrations - Volumetric Analysis Term Volumetric analysis Burette Pipette titrate titre aliquot end point equivalence point indicator primary standard standardisation secondary
More informationVolumetric Analysis: Analysis of antacid tablets Analysis of Cl - concentrations in IV solutions
Volumetric Analysis: Analysis of antacid tablets Analysis of Cl - concentrations in IV solutions OBJECTIVE: The goals of this experiment are to learn titration concepts and techniques. SKILLS: Titration,
More informationAcid-Base Titrations
Chem 1252, General Chemistry I Lab Johnson Acid-Base Titrations Introduction Titration is a convenient quantitative method for accurately determining unknown concentrations of solutions. A necessary requirement
More informationSolubility of KHT and Common ion Effect
Solubility of KHT and Common ion Effect v010516 You are encouraged to carefully read the following sections in Tro (3 rd ed.) to prepare for this experiment: Sec 16.5, pp 783-788 (Solubility Equilibria
More informationDETERMINATION OF THE SOLUBILITY PRODUCT OF GROUPII HYDROXIDES
INTRODUCTION DETERMINATION OF THE SOLUBILITY PRODUCT OF GROUPII HYDROXIDES SOLUBILTY EQUILIBRIA Many systems in chemistry appear to be static when in fact they are in (dynamic) equilibrium. When a system
More informationDetermination of the Equivalent Weight and Ionization Constant of a Weak Acid
Determination of the Equivalent Weight and Ionization Constant of a Weak Acid Introduction: The object of this experiment will be to determine the ionization constant, K a, and the equivalent weight of
More informationChemistry 143 Experiment #11 Acid Base Titration Dr. Caddell. Titrating Acid
Titrating Acid In this lab you will first determine the concentration of sodium hydroxide in a stock solution that you prepare. You will then use that stock sodium hydroxide solution to titrate a solution
More informationAustralian National Titration Competition. Basics of Titration
Basics of Titration prepared by Elaine Bergmann on behalf of the Chemical Education Group of the Royal Australian Chemical Institute, Queensland Branch Contents: 1 Basic Theory of Acid-Base Titration 2
More informationExperiment 10 Acid-Base Titrimetry. Objectives
Experiment 10 Acid-Base Titrimetry Objectives 1. To standardize an acid, HCl, solution. 2. To determine the concentration of an unknown Na 2 CO 3, sodium carbonate solution. Introduction Alkaline conditions
More information[Ca 2+ ] = s (3) [IO - 3 ] = 2s (4)
E10 Chemical Equilibria: K sp of Calcium Iodate Objective! Understand the relation between the molar solubility and the solubility product constant of a sparingly soluble salt.! Measure the molar solubility
More informationSTUDYING CHEMICAL REACTIONS BY TITRATION ANALYSIS
STUDYING CHEMICAL REACTIONS BY TITRATION ANALYSIS OBJECTIVES: Study the relationship of reactants & products in solution phase chemical reactions, Learn how to prepare solutions from solid and liquid stock,
More informationAscorbic Acid Titration of Vitamin C Tablets
Ascorbic Acid Titration of Vitamin C Tablets Introduction This experiment illustrates how titration, the process of slowly adding one solution to another until the reaction between the two is complete,
More informationTITRATION: STANDARDIZATION OF A BASE AND ANALYSIS OF STOMACH ANTACID TABLETS. Teacher Notes
TITRATION: STANDARDIZATION OF A BASE AND ANALYSIS OF STOMACH ANTACID TABLETS Teacher Notes This experiment is designed for students working singly or in groups of two. The overall purpose of this experiment
More informationTitration of Acetic Acid in Vinegar Minneapolis Community and Technical College v.9.17
Titration of Acetic Acid in Vinegar Minneapolis Community and Technical College v.9.17 Objective: To practice the correct use of the burette, volumetric pipette, and volumetric flask in analytical titrations.
More informationChemistry 143 Acid Base Titration Dr. Caddell. Titrating Acid
Titrating Acid In this lab you will first determine the concentration of sodium hydroxide in a stock solution that you prepare. You will then use that stock sodium hydroxide solution to titrate a solution
More informationExperiment 8 Introduction to Volumetric Techniques I. Objectives
Experiment 8 Introduction to Volumetric Techniques I Objectives 1. To learn the proper technique to use a volumetric pipette. 2. To learn the proper technique to use a volumetric flask. 3. To prepare a
More informationVolumetric Measurement Techniques. Technique #1 Use of a Burette. Technique #2 Use of a Pipette. Technique #3 Use of a Volumetric Flask
Volumetric Measurement Techniques Technique #1 Use of a Burette Technique #2 Use of a Pipette Technique #3 Use of a Volumetric Flask Technique #4 Use of a Bottle-Top Dispenser Last updated 12/6/2009 5:46
More informationEXPERIMENT 22 SOLUBILITY OF A SLIGHTLY SOLUBLE ELECTROLYTE
EXPERIMENT 22 SOLUBILITY OF A SLIGHTLY SOLUBLE ELECTROLYTE INTRODUCTION Electrolytes are compounds that are present in solution as ions. They are more likely to be soluble in water than in most other liquids
More information(b) Write the chemical equation for the dissolution of NaOH in water.
Making a Solution and Measuring ph Prelab Assignment Read the entire lab. Write an objective and any hazards associated with this lab in your laboratory notebook. Answer the following 6 questions in your
More informationChesapeake Campus Chemistry 111 Laboratory
Chesapeake Campus Chemistry 111 Laboratory Objectives Calculate the concentration of a secondary standard through titration with a primary standard. Titrate a sample of carbonated soda with a standard
More informationLab Report. Acid Base Lab Determination of CaCO3 in Toothpaste
Lab Report Acid Base Lab Determination of CaCO3 in Toothpaste Chawalnrath Wongdeshanan(Kat) 11 1 Pitchaya Areekarnlert (Petch) 11 1 Karnsinee Yotsakulsate(Jenny) 11 1 Pukjira Ittarut(Pim) 11 1 Date: 27
More informationTitration of Vinegar
EXPERIMENT 8 Prepared by Edward L. Brown, Lee University and Verrill M. Norwood, Cleveland State Community Collee The student will become familiar with the techniques of titration and expressin a solution
More informationAnalysis of Hypochlorite in Bleach
Experiment 8 Analysis of Hypochlorite in Bleach Adapted by B. D. West and S. E. Schullery of Eastern Michigan University from ANAL 119, written by Enno Wolthuis, Calvin College, published by Chemical Education
More informationO H 3 O 1 1 A. O 1 1 OH (K w
CHAPTER 8 Acid Base Titration Curves Objectives The objectives of this experiment are to: Understand the titration curves for the following solutions: a strong acid: hydrochloric acid, HCl. a weak acid:
More informationPercentage of Acetic Acid in Vinegar
Microscale Percentage of Acetic Acid in Vinegar When sweet apple cider is fermented in the absence of oxygen, the product is an acid, vinegar. Most commercial vinegars are made by fermentation, but some,
More information2002 D Required 2001 D Required
2002 D Required A student is asked to determine the molar enthalpy of neutralization, H neut, for the reaction represented above. The student combines equal volumes of 1.0 M HCl and 1.0 M NaOH in an open
More information#13 ph-titration of Weak Acids with Strong Bases
#13 ph-titration of Weak Acids with Strong Bases Purpose: A weak acid solution is titrated with a strong base solution. A titration curve is then used to identify the unknown acid and to find its concentration.
More informationPOGIL LAB EXERCISE 15 HOW DO YOU STANDARDIZE AN ACID AND BASE?
POGIL LAB EXERCISE 15 HOW DO YOU STANDARDIZE AN ACID AND BASE? POGIL LAB 15 Page 1 of 10 Each member should assume his or her role at this time. The new manager takes charge of the POGIL folder and hands
More informationDilutions 4/8/2013. Steps involved in preparing solutions from pure solids. Steps involved in preparing solutions from pure solids
Steps involved in preparing solutions from pure solids Steps involved in preparing solutions from pure solids Calculate the amount of solid required Weigh out the solid Place in an appropriate volumetric
More informationPre-lab: Read sections 10.6 in the textbook. Complete the attached pre-lab by Thursday, May 22.
Lab 5: Titration of an unknown acid Objective: Determine the concentration of an unknown monoprotic acid by titration, the process that matches the number of moles of base with the number of moles of acid.
More informationAscorbic Acid Titration of Vitamin C Tablets This lab will be completed individually! Make sure you come prepared!
Ascorbic Acid Titration of Vitamin C Tablets This lab will be completed individually! Make sure you come prepared! This laboratory experiment has a formal report. Consult the guidelines for writing a formal
More informationSolubility Product Constant (K sp ) and the Common-Ion Effect for Calcium Iodate, a Salt of Limited Solubility
Solubility Product Constant (K sp ) and the Common-Ion Effect for Calcium Iodate, a Salt of Limited Solubility Purpose Determine the solubility product constant (K sp ) for a sparingly soluble salt. Study
More informationDetermination of the K a Value and Molar Mass of an Unknown Weak Acid
10 Determination of the K a Value and Molar Mass of an Unknown Weak Acid Introduction In this experiment you will titrate a monoprotic weak acid with a strong base, and measure the titration curve with
More informationSynthesis and Analysis of a Coordination Compound
Synthesis and Analysis of a Coordination Compound In addition to forming salts with anions, transition metal cations can also associate with neutral molecules (and ions) through a process called ligation.
More informationExperiment 3: Acids, Bases, and Buffers
Experiment 3: Acids, Bases, and Buffers Reading: Chemistry the Central Science, Chapter 16.1-16.7 Introduction: The reaction of an acid and a base is a neutralization reaction. The technique of accurately
More informationExperiment 5E BOTTLES WITHOUT LABELS: STUDIES OF CHEMICAL REACTIONS
Experiment 5E BOTTLES WITHOUT LABELS: STUDIES OF CHEMICAL REACTIONS FV 1-21-16 MATERIALS: Eight 50 ml beakers, distilled water bottle, two 250 ml beakers, conductivity meter, ph paper (A/B/N), stirring
More informationNCEA Chemistry 2.1 Quantitative Analysis AS 91161
NCEA Chemistry 2.1 Quantitative Analysis AS 91161 What is this NCEA Achievement Standard? When a student achieves a standard, they gain a number of credits. Students must achieve a certain number of credits
More informationEXPERIMENT #9 PRELAB EXERCISES. Redox Titration (Molarity Version) Name Section. 1. Balance the following redox reaction under acidic conditions.
EXPERIMENT #9 PRELAB EXERCISES Redox Titration (Molarity Version) Name Section 1. Balance the following redox reaction under acidic conditions. C 2 O 2-4 (aq) + MnO - 4 (aq) CO 2 (g) + Mn 2+ (aq) 2. A
More informationChapter 9. Volumetric Analysis
Chapter 9 Volumetric Analysis The terms volumetric analysis, titrimetry and titration are used interchangeably to describe a procedure which analyses chemicals in solution by accurate volume measurement.
More informationChemistry 119: Experiment 4. Titrimetric Determination of Acetic Acid Samples And Preparation of Youden Plot
Chemistry 119: Experiment 4 Titrimetric Determination of Acetic Acid Samples And Preparation of Youden Plot In this experiment standard sodium hydroxide solution is used to titrimetrically determine acetic
More informationReaction Stoichiometry
Reaction Stoichiometry PURPOSE To determine the stoichiometry of acid-base reactions by measuring temperature changes which accompany them. GOALS To learn to use the MicroLab Interface. To practice generating
More informationCHEMISTRY 130 General Chemistry I OXIDATION-REDUCTION CHEMISTRY
CHEMISTRY 130 General Chemistry I OXIDATION-REDUCTION CHEMISTRY A solution of potassium permanganate is pink. [1] Color changes can often be used to monitor chemical reactions. DEPARTMENT OF CHEMISTRY
More informationAP Chemistry Laboratory Review
Part I MATCH the following procedures with the correct descriptions or pictures in Part II (not all are shown you should review these procedures from your laboratory notebook) - Gravimetric Analysis -
More information