(3 pts) 1. Which of the following is a correct chemical symbol for a monatomic species containing 16 protons, 16 neutrons, and 18 electrons?
|
|
- Todd Mosley
- 5 years ago
- Views:
Transcription
1 (3 pts) 1. Which of the following is a correct chemical symbol for a monatomic species containing 16 protons, 16 neutrons, and 18 electrons? (A) S 2 (B) Ar (C) P 3+ (D) P 3 (E) S 2+ (3 pts) 2. The amount of the radioactive 10 Be isotope has been measured to determine the age of ice cores. The nucleus of a 10 Be atom contains. (A) 6 protons and 4 neutrons (C) 4 protons and 4 electrons (E) 5 protons and 5 electrons (B) 4 protons and 6 neutrons (D) 5 protons and 5 neutrons (3 pts) 3. Given that the formula for the ionic compound lithium sulfite is Li2SO3, what is the charge on a sulfite ion? (A) 2+ (B) 1+ (C) 2 (D) 1 (E) 3 (3 pts) 4. Element X has three naturally occurring isotopes. Based on the isotopic abundances shown below, what is the identity of element X? Isotope Mass Abundance (amu) 20 X % 21 X % 22 X % (A) F (B) Ne (C) Na (D) Mg (E) O (4 pts) 5. How many of the following statements are true? (i) A substance that dissolves in water to produce H3O + ions is a base. (ii) A strong acid is any acidic solution with a concentration > 5 M. (iii) A solution of HCl(aq) does not actually contain any intact HCl molecules. (iv) When dissolved in water, CH3COOH acts as a weak acid. (v) The reaction of a strong acid and a strong base always has H2 as a product. (A) 5 (B) 4 (C) 3 (D) 2 (E) 1 B L.S. Brown
2 NAME: (5 pts) 6. The compound shown below is linalool, which is used as a scent in many soaps and shampoos. What is its molar mass, rounded to the nearest whole number? OH (A) 112 g/mol (B) 146 g/mol (C) 156 g/mol (D) 154 g/mol (E) 137 g/mol (5 pts) 7. What is the sum of all of the stoichiometric coefficients when the following equation is correctly balanced? (Use the smallest possible whole number coefficients. If your equation includes any coefficients of one, be sure to count those.) FeCr2O7 + K2CO3 + O2 K2CrO4 + Fe2O3 + CO2 4 FeCr2O7 + 8 K2CO3 + O2 8 K2CrO4 + 2 Fe2O3 + 8 CO2 (A) 9 (B) 15 (C) 24 (D) 42 (E) 31 (4 pts) 8. How many moles of hydrogen atoms are in 1 mole of (NH4)2SO4? (A) 2 (B) 8 (C) 4 (D) 12 (E) 16 (5 pts) 9. A student needs to prepare ml of M MgBr2 solution for an experiment. What mass of solid MgBr2 should be used? (A) 92.0 g (B) 8.63 g (C) 5.75 g (D) 46.0 g (E) 6.72 g mol g L = g 1 L 1 mol 2018 L.S. Brown B3
3 (5 pts) 10. A beaker containing ml of 1.00 M NaCl(aq) is left in a laboratory fume hood. After several days the concentration has risen to 1.25 M. How much water must have evaporated from the original solution? (Evaporation will remove only H2O, not any of the NaCl.) (A) 25.0 ml (B) 20.0 ml (C) 75.0 ml (D) 80.0 ml (E) 33.3 ml Concentration increases by factor of 5/4, so volume decreases by factor of 4/5. (5 pts) 11. What volume of M HCl would be needed to completely neutralize 50.0 ml of M Ba(OH)2 in an acid-base titration? (A) 12.5 ml (B) 18.0 ml (C) 24.0 ml (D) 3.13 ml (E) 6.25 ml 2 HCl + Ba(OH)2 2 H2O + BaCl L mol Ba(OH) 2 1 L 2 mol HCl 1 L = L = ml 1 mol Ba(OH) mol HCl (5 pts) 12. Ammonia is formed from the reaction of H2 and N2. 3 H2(g) + N2(g) 2 NH3(g) Which of the following reactant mixtures could produce the greatest amount of product? (Assume that the reaction goes to completion with 100% yield.) (A) 1 mol H2 and 5 mol N2 (C) 3 mol H2 and 3 mol N2 (B) 2 mol H2 and 4 mol N2 (D) 5 mol H2 and 1 mol N2 (E) 4 mol H2 and 2 mol N2 This is a limiting reactant question. Moles of NH3 produced would be 2/3, 4/3, 2, 2, and 8/3, repectively for A E. B L.S. Brown
4 NAME: Use the following information to answer questions 13 & 14. Pb(NO3)2, KI, and KNO3 are all strong electrolytes. When solutions of KI and Pb(NO3)2 are mixed, they react according to the following equation. Pb(NO3)2(aq) + 2 KI(aq) PbI2(s) + 2 KNO3(aq) (4 pts) 13. A molecular scale illustration representing the two reactant solutions is shown below. = Pb 2+ = NO3 = K + = I Which of the following pictures best represents the expected products when the two solutions shown above are mixed? (A) (B) (C) (D) (E) (4 pts) 14. Which species act only as spectator ions in this reaction? (A) K + and NO3 (B) Pb 2+ and I (C) K + and Pb 2+ (D) I and NO3 (E) K + and I 2018 L.S. Brown B5
5 (6 pts) 15. Aluminum (Al, 2.70 g/cm 3 ) and strontium (Sr, 2.64 g/cm 3 ) have nearly the same density. Suppose you had 2 cubes, one made of pure aluminum and the other made of pure strontium, with each cube containing 1 mole of its element. Which cube would be smaller, and what would the edge length of the smaller cube be? (A) Sr, 3.21 cm (B) Sr, 5.76 cm (C) Al, 3.16 cm (D) Al, 2.15 cm (E) Both cubes would be the same size, 1.39 cm Molar masses are g/mol for Al and g/mol for Sr. Because the aluminum is so much lighter, it will be the small cube. Use density to get volume, and then cube root to get edge length of cube g g cm 3 = cm3 and (9. 99) 1 3 = cm (6 pts) 16. On February 2 the market price for palladium metal was $1040 per troy ounce. How many palladium (Pd, Z = 46) atoms could you buy for $1.00? (1 troy ounce = g) (A) (B) (C) (D) (E) $1 1 oz t g 1 mol $ oz t g Rh atoms = atoms 1 mol B L.S. Brown
6 NAME: (10 pts) 17. The pink color of salmon is largely due to the presence of astaxanthin. Elemental analysis shows that astaxanthin contains 80.50% carbon, 8.78% hydrogen, and 10.72% oxygen by mass. Another test shows that the molar mass of the compound is between 500 and 650 g/mol. Find the molecular formula for astaxanthin. We can use the percentages to find the empirical formula, then it should turn out that only one multiple of it will be in the given mass range. Start by taking a 100 g sample and converting the masses to moles, then divide by the smallest number of moles: g C = mol C = g/mol 8.78 g H = mol H = g/mol g O = mol O = g/mol So our empirical formula is C10H13O That would have a molar mass of ~149 g/mol. So the only multiple that will fall between 500 and 650 is to multiply that by 4, giving us the molecular formula of: C40H52O L.S. Brown B7
7 (10 pts) 18. Calcium carbonate (limestone, CaCO3) dissolves in hydrochloric acid, producing water and carbon dioxide as shown in the following equation. Calcium chloride is a soluble ionic compound, so it dissociates to give calcium ions and chloride ions. Suppose 8.50 g of solid CaCO3 is added to 725 ml of M HCl. Assuming that the volume of the final solution is still 725 ml, what concentration of Ca 2+ ions should be present? CaCO3(s) + 2 HCl(aq) H2O(!) + CO2(g) + CaCl2(aq) We are given the amounts of each reactant, so we need to start by finding the limiting reactant. Convert given info to moles: 8.50 g CaCO3 = mol (MM = 100 g/mol) (0.725 L)(0.15 mol/l) = mol HCl From those conclude that HCl is limiting. (various ways to do this) Then calculate from the HCl: mol HCl 1 mol CaCl 2 2 mol HCl 1 mol Ca 2+ 1 mol CaCl 2 = mol Ca 2+ And that number of moles is in the 725 ml volume, so molarity is: mol Ca L = M Ca 2+ If you chose the CaCl2 as the LR, you would get M Ca 2+ B L.S. Brown
8 NAME: (10 pts) 19. KCl and KBr are both ionic solids. A mixture of KCl and KBr has a mass of g. When this mixture is heated in the presence of excess Cl2, all of the KBr is converted to KCl. If the total mass of KCl present after this reaction is g, what percentage (by mass) of the original mixture was KBr? (HINT: Be sure that you understand why the mass of the sample has decreased. It may help if you write an equation for the reaction that converted the KBr to KCl.) The mass decreases because the reaction replaces a heavier Br with a lighter Cl. There are a couple of ways we could work the problem, but no matter what we do we will need to use the change in mass, which is just Dm = g g = g Maybe the easiest thing to do is to then say that if we had replaced 1 mole of Br with Cl, the change in mass would just be the difference in the molar masses: mbr mcl = = g/mol We can use those two numbers to find the number of moles of Br actually replaced: 1 mol Br g = mol Br g That s also the moles of KBr initially present, so we can convert it to mass: g KBr mol KBr = g KBr 1 mol KBr g KBr =0.650 so the sample was 65.0% KBr g total An alternative approach would be to find the final mass of KCl if the original sample had been 100% KBr. 1 mol KBr 1 mol KCl g KCl g KBr g 1 mol KBr 1 mol KCl = g So if it was 100% KBr, then we would have Dm = g g = g Divide the actual Dm of g by that to get the fraction of KBr: g =0.650, which matches our previous result g 2018 L.S. Brown B9
(3 pts) 1. Which of the following is a correct chemical symbol for a monatomic species containing 13 protons, 14 neutrons, and 10 electrons?
(3 pts) 1. Which of the following is a correct chemical symbol for a monatomic species containing 13 protons, 14 neutrons, and 10 electrons? (A) Si (B) Ne (C) Al 3+ (D) Al 3 (E) O 2 (3 pts) 2. The amount
More informationReactions in aqueous solutions Precipitation Reactions
Reactions in aqueous solutions Precipitation Reactions Aqueous solutions Chemical reactions that occur in water are responsible for creation of cenotes. When carbon dioxide, CO2, dissolves in water, the
More informationChemistry 101 Chapter 4 STOICHIOMETRY
STOICHIOMETRY Stoichiometry is the quantitative relationship between the reactants and products in a balanced chemical equation. Stoichiometry allows chemists to predict how much of a reactant is necessary
More informationThe Mole. Relative Atomic Mass Ar
STOICHIOMETRY The Mole Relative Atomic Mass Ar Relative Molecular Mass Mr Defined as mass of one atom of the element when compared with 1/12 of an atom of carbon-12 Some Ar values are not whole numbers
More informationChapter 3. Mass Relationships in Chemical Reactions
Chapter 3 Mass Relationships in Chemical Reactions In this chapter, Chemical structure and formulas in studying the mass relationships of atoms and molecules. To explain the composition of compounds and
More informationChapter Four: Reactions in Aqueous Solution
Chapter Four: Reactions in Aqueous Solution Learning Outcomes: Identify compounds as acids or bases, and as strong, weak, or nonelectrolytes Recognize reactions by type and be able to predict the products
More informationChemistry (www.tiwariacademy.com)
() Question 1.1: Calculate the molecular mass of the following: (i) H2O (ii) CO2 (iii) CH4 Answer 1.1: (i) H2O: The molecular mass of water, H2O = (2 Atomic mass of hydrogen) + (1 Atomic mass of oxygen)
More informationThe solvent is the dissolving agent -- i.e., the most abundant component of the solution
SOLUTIONS Definitions A solution is a system in which one or more substances are homogeneously mixed or dissolved in another substance homogeneous mixture -- uniform appearance -- similar properties throughout
More informationWhich of the following answers is correct and has the correct number of significant figures?
Avogadro s Number, N A = 6.022 10 23 1. [7 points] Carry out the following mathematical operation: 6.06 10 3 + 1.1 10 2 Which of the following answers is correct and has the correct number of significant
More informationTopic 1a Atomic Structure Revision Notes
Topic 1a Atomic Structure 1) Fundamental particles Atoms consist of protons, neutrons and electrons Protons and neutrons are found in the nucleus which contains most of the mass of the atom and all of
More information1) What is the volume of a tank that can hold Kg of methanol whose density is 0.788g/cm 3?
1) Convert the following 1) 125 g to Kg 6) 26.9 dm 3 to cm 3 11) 1.8µL to cm 3 16) 4.8 lb to Kg 21) 23 F to K 2) 21.3 Km to cm 7) 18.2 ml to cm 3 12) 2.45 L to µm 3 17) 1.2 m to inches 22) 180 ºC to K
More informationName: Unit 4 Study Guide Part 1
Name: Unit 4 Study Guide Part 1 Review of last unit: 1. What follows an element s symbol in a chemical formula to indicate the number of atoms of that element in one molecule of the compound? 2. What is
More informationTYPES OF CHEMICAL REACTIONS
TYPES OF CHEMICAL REACTIONS Precipitation Reactions Compounds Soluble Ionic Compounds 1. Group 1A cations and NH 4 + 2. Nitrates (NO 3 ) Acetates (CH 3 COO ) Chlorates (ClO 3 ) Perchlorates (ClO 4 ) Solubility
More informationAP Chemistry Campbell
11. The molar mass of magnesium carbonate is (A) 80.0 g mol 1 (B) 84.3 g mol 1 (C) 88.2 g mol 1 (D) 82.0 g mol 1 12. When the equation below is written and balanced, what is the coefficient for the hydrochloric
More informationChapter 4. Reactions in Aqueous Solution
Chapter 4. Reactions in Aqueous Solution 4.1 General Properties of Aqueous Solutions A solution is a homogeneous mixture of two or more substances. A solution is made when one substance (the solute) is
More informationCHEM 200/202. Professor Jing Gu Office: EIS-210. All s are to be sent to:
CHEM 200/202 Professor Jing Gu Office: EIS-210 All emails are to be sent to: chem200@mail.sdsu.edu My office hours will be held in GMCS-212 on Monday from 9 am to 11 am or by appointment. ANNOUNCEMENTS
More informationChemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals.
Chemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals. Evidence to indicate that a chemical reaction has occurred: Temperature change Different coloured materials
More informationGeneral Chemistry. Chapter 3. Mass Relationships in Chemical Reactions CHEM 101 (3+1+0) Dr. Mohamed El-Newehy 10/12/2017
General Chemistry CHEM 101 (3+1+0) Dr. Mohamed El-Newehy http://fac.ksu.edu.sa/melnewehy Chapter 3 Mass Relationships in Chemical Reactions 1 In this chapter, Chemical structure and formulas in studying
More informationChapter 4. Chemical Quantities and Aqueous Reactions
Lecture Presentation Chapter 4 Chemical Quantities and Aqueous Reactions Reaction Stoichiometry: How Much Carbon Dioxide? The balanced chemical equations for fossilfuel combustion reactions provide the
More informationPage III-4b-1 / Chapter Four Part II Lecture Notes. Chemistry 221 Professor Michael Russell MAR. Ba(NO3)2(aq)? soluble. BaCl2(aq)?
Page III-4b-1 / Chapter Four Part II Lecture Notes Solution Stoichiometry and Chemical Reactions Chapter 3 & Chapter 4, or Chapter 4 Part II Chemistry 221 Professor Michael Russell Terminology In solution
More informationTopic 1 Review. Ms. Kiely Coral Gables Senior High IB Chemistry SL
Topic 1 Review Ms. Kiely Coral Gables Senior High IB Chemistry SL Bell-Ringer A 4 g sample of sodium hydroxide, NaOH, is dissolved in water and made up to 500 cm³ of aqueous solution. What is the concentration
More informationLesson (1) Mole and chemical equation
Lesson (1) Mole and chemical equation 1 When oxygen gas reacts with magnesium, magnesium oxide is formed. Such Reactions are described by balanced equations known as "chemical equations" Δ 2Mg(s) + O2(g)
More informationCh 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON
Ch 7 Chemical Reactions Study Guide Accelerated Chemistry SCANTRON Name /80 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. Correct the False statments by changing the
More informationTypes of chemical reactions
PowerPoint to accompany Types of chemical reactions Chapters 3 & 16.1 M. Shozi CHEM110 / 2013 General Properties of Aqueous Solutions Solutions are mixtures of two or more pure substances. The solvent
More informationAnnouncements. Exam 1 is on Thursday, September 23 from 7-8:10pm; Conflict exam is from 5:35-6:45pm
Announcements Print worksheet #6 prior to your Tuesday discussion section LON-CAPA assignment 4 is now available Don t forget to bring your Clicker to class EVERY day The points from last week have been
More informationGeneral Chemistry 1 CHM201 Unit 2 Practice Test
General Chemistry 1 CHM201 Unit 2 Practice Test 1. Which statement about the combustion of propane (C 3H 8) is not correct? C 3H 8 5O 2 3CO 2 4H 2O a. For every propane molecule consumed, three molecules
More informationChapter 3 Stoichiometry. Ratios of combination
Chapter 3 Stoichiometry Ratios of combination Topics Molecular and formula masses Percent composition of compounds Chemical equations Mole and molar mass Combustion analysis (Determining the formula of
More informationSteward Fall 08. Moles of atoms/ions in a substance. Number of atoms/ions in a substance. MgCl 2(aq) + 2 AgNO 3(aq) 2 AgCl (s) + Mg(NO 3 ) 2(aq)
Dealing with chemical stoichiometry Steward Fall 08 of Not including volumetric stoichiometry of Chapter 6.0x10 A 6.0x10 Mol/mol ratio from balanced equation B 6.0x10 6.0x10 s, Equations, and Moles: II
More informationNotes: Unit 7 Moles & Stoichiometry
Regents Chemistry: Notes: Unit 7 Moles & Stoichiometry 1 KEY IDEAS A compound is a substance composed of two or more different elements that are chemically combined in a fixed proportion. A chemical compound
More informationConcentration of Solutions
Solutions We carry out many reactions in solutions Remember that in the liquid state molecules move much easier than in the solid, hence the mixing of reactants occurs faster Solute is the substance which
More information1st Semester Review Worth 10% of Exam Score
1st Semester Review 2014-2015 Worth 10% of Exam Score Name: P: 1. Which of the following is the correct electron configuration for a neutral atom of oxygen in the ground state? A) 1s 2 2p 4 B) 1s 2 2s
More informationReview of Chemistry 11
Review of Chemistry 11 HCl C 3 H 8 SO 2 NH 4 Cl KOH H 2 SO 4 H 2 O AgNO 3 PbSO 4 H 3 PO 4 Ca(OH) 2 Al(OH) 3 P 2 O 5 Ba(OH) 2 CH 3 COOH 1. Classify the above as ionic or covalent by making two lists. Describe
More informationChapter 4 Reactions in Aqueous Solutions. Copyright McGraw-Hill
Chapter 4 Reactions in Aqueous Solutions Copyright McGraw-Hill 2009 1 4.1 General Properties of Aqueous Solutions Solution - a homogeneous mixture Solute: the component that is dissolved Solvent: the component
More informationChapter 4. Reactions In Aqueous Solution
Chapter 4 Reactions In Aqueous Solution I) General Properties of Aqueous Solutions Homogeneous mixture on a molecular level - prop. same throughout - separable by physical means - variable composition
More informationSolubility Rules See also Table 4.1 in text and Appendix G in Lab Manual
Ch 4 Chemical Reactions Ionic Theory of Solutions - Ionic substances produce freely moving ions when dissolved in water, and the ions carry electric current. (S. Arrhenius, 1884) - An electrolyte is a
More informationCalifornia Standards Test (CST) Practice
California Standards Test (CST) Practice 1. Which element has properties most like those of magnesium? (a) calcium (b) potassium (c) cesium (d) sodium 5. Which pair of atoms will share electrons when a
More information7/16/2012. Chapter Four: Like Dissolve Like. The Water Molecule. Ionic Compounds in Water. General Properties of Aqueous Solutions
General Properties of Aqueous Solutions Chapter Four: TYPES OF CHEMICAL REACTIONS AND SOLUTION STOICHIOMETRY A solution is a homogeneous mixture of two or more substances. A solution is made when one substance
More informationPart A Answer all questions in this part.
Part A Directions (1-24): For each statement or question, record on your separate answer sheet the number of the word or expression that, of those given, best completes the statement or answers the question.
More informationChapter 4 Aqueous Reactions and Solution Stoichiometry
Chapter 4 Aqueous Reactions and Solution Stoichiometry 4.1 General Properties of Aqueous Solutions What is a solution? How do you identify the following two? Solvent. Solute(s). Dissociation. What is it?
More informationChemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals.
Chemistry 11 Notes on Chemical Reactions Chemical Reaction Defn: Chemical Reaction: when starting chemical species form different chemicals. Evidence to indicate that a chemical reaction has occurred:
More informationFormulas and Models 1
Formulas and Models 1 A molecular formula shows the exact number of atoms of each element in the smallest unit of a substance An empirical formula shows the simplest whole-number ratio of the atoms in
More informationCh 3.3 Counting (p78) One dozen = 12 things We use a dozen to make it easier to count the amount of substances.
Ch 3.3 Counting (p78) One dozen = 12 things We use a dozen to make it easier to count the amount of substances. Moles the SI base unit that describes the amount of particles in a substance. Mole is abbreviated
More informationSolution Stoichiometry
Chapter 8 Solution Stoichiometry Note to teacher: You will notice that there are two different formats for the Sample Problems in the student textbook. Where appropriate, the Sample Problem contains the
More informationChemistry 150/151 Review Worksheet
Chemistry 150/151 Review Worksheet This worksheet serves to review concepts and calculations from first semester General Chemistry (CHM 150/151). Brief descriptions of concepts are included here. If you
More informationUnit 10 Solution Chemistry 1. Solutions & Molarity 2. Dissolving 3. Dilution 4. Calculation Ion Concentrations in Solution 5. Precipitation 6.
Unit 10 Solution Chemistry 1. Solutions & Molarity 2. Dissolving 3. Dilution 4. Calculation Ion Concentrations in Solution 5. Precipitation 6. Formula, Complete, Net Ionic Equations 7. Qualitative Analysis
More informationTest bank chapter (3)
Test bank chapter (3) Choose the correct answer 1. What is the mass, in grams, of one copper atom? a) 1.055 10 - g b) 63.55 g c) 1 amu d) 1.66 10-4 g. Determine the number of moles of aluminum in 96.7
More informationCHE 105 Spring 2018 Exam 2
CHE 105 Spring 2018 Exam 2 Your Name: Your ID: Question #: 1 A penny contains 373 x 10 2 moles of zinc How many atoms of zinc are in a penny? A 225 x 10 22 atoms B 221 x 10 23 atoms C 375 x 10 22 atoms
More informationCHEM 200/202. Professor Jing Gu Office: EIS-210. All s are to be sent to:
CHEM 200/202 Professor Jing Gu Office: EIS-210 All emails are to be sent to: chem200@mail.sdsu.edu My office hours will be held in GMCS-212 on Monday from 9 am to 11 am or by appointment. ANNOUNCEMENTS
More informationStudent Version Notes: Unit 5 Moles & Stoichiometry
Name: Regents Chemistry: Mr. Palermo Student Version Notes: Unit 5 Moles & Stoichiometry Name: KEY IDEAS A compound is a substance composed of two or more different elements that are chemically combined
More informationChapter No. 1 BASIC CONCEPTS Short Question With Answer Q.1 Calculate the grams atoms in 0.4 gm of potassium. Gram atoms of potassium = = = 0.01 grams atoms Q.2 23 grams of sodium and 238 gram of uranium
More informationChapter 4. Solutions and Solution Stoichiometry
Chapter 4 Solutions and Solution Stoichiometry Solutions Homogeneous mixtures are called solutions. The component of the solution that changes state is called the solute. The component that keeps its state
More information2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with
Chapter 3: Chemical Formulae and Equations 1. Relative atomic mass, A r - The relative atomic mass of an element is the average mass of one atom of an element when compared with mass of an atom of carbon-12
More informationOregon State University, Summer 2009 Chemistry 121 Midterm Exam 2, July 3rd, 10 am
Oregon State University, Summer 2009 Chemistry 121 Midterm Exam 2, July 3rd, 10 am DO NOT OPEN THIS EXAM UNTIL INSTRUCTED. CALCULATORS ARE NOT TO BE SHARED. Instructions : You should have with you several
More informationCH 221 Chapter Four Part II Concept Guide
CH 221 Chapter Four Part II Concept Guide 1. Solubility Why are some compounds soluble and others insoluble? In solid potassium permanganate, KMnO 4, the potassium ions, which have a charge of +1, are
More informationD O UBLE DISPL Ac EMENT REACTIONS
Experiment 8 Name: D O UBLE DISPL Ac EMENT REACTIONS In this experiment, you will observe double displacement reactions and write the corresponding balanced chemical equation and ionic equations. Double
More information5. [7 points] What is the mass of gallons (a fifth) of pure ethanol (density = g/cm 3 )? [1 gallon = Liters]
1 of 6 10/20/2009 3:55 AM Avogadro s Number, N A = 6.022 10 23 1. [7 points] Given the following mathematical expression: (15.11115.0)/(2.154 10 3 ) How many significant figures should the answer contain?
More informationReactions in Aqueous Solution
1 Reactions in Aqueous Solution Chapter 4 For test 3: Sections 3.7 and 4.1 to 4.5 Copyright The McGrawHill Companies, Inc. Permission required for reproduction or display. 2 A solution is a homogenous
More informationCHE 105 Exam 2 Spring 2017
CHE 105 Exam 2 Spring 2017 Your Name: Your ID: Question #: 1 What is the chemical formula of chromium(iii) bromide? A. CrBr B. CrBr2 C. Cr2Br D. Cr3Br E. CrBr3 F. Cr2Br3 Question #: 2 What is the correct
More informationChapter 3: Stoichiometry
Chapter 3: Stoichiometry Key Skills: Balance chemical equations Predict the products of simple combination, decomposition, and combustion reactions. Calculate formula weights Convert grams to moles and
More informationName Period CH 180 Practice Test: Chapters 3 and 4
Name Period CH 180 Practice Test: Chapters 3 and 4 Multiple Choice: 1. 11. 2. 12. 3. 13. 4. 14. 5. 15. 6. 16. 7. 17. 8. 18. 9. 19. 10. 20. 21. 22. 23. 24. 25. 26. 27. 1 Directions: Answer all questions.
More informationD O UBLE DISPL Ac EMENT REACTIONS
Experiment 8 Name: D O UBLE DISPL Ac EMENT REACTIONS In this experiment, you will observe double displacement reactions and write the corresponding balanced chemical equation and ionic equations. Double
More informationDuring photosynthesis, plants convert carbon dioxide and water into glucose (C 6 H 12 O 6 ) according to the reaction:
Example 4.1 Stoichiometry During photosynthesis, plants convert carbon dioxide and water into glucose (C 6 H 12 O 6 ) according to the reaction: Suppose that a particular plant consumes 37.8 g of CO 2
More informationChapter How many grams of a 23.4% by mass NaF solution is needed if you want to have 1.33 moles of NaF?
Chapter 13 1. Which of the following compounds is a strong electrolyte? a. NH 4Cl b. NaCl c. NaC 2H 3O 2 d. HCl e. All of the above 2. A solution that is 13.58% by mass of sugar contains 13.75 grams of
More informationMass Relationships in Chemical Reactions
Mass Relationships in Chemical Reactions Chapter 3 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Micro World atoms & molecules Macro World grams Atomic mass
More informationinsoluble partial very soluble (< 0.1 g/100ml) solubility (> 1 g/100ml) Factors Affecting Solubility in Water
Aqueous Solutions Solubility is a relative term since all solutes will have some solubility in water. Insoluble substances simply have extremely low solubility. The solubility rules are a general set of
More informationChapter 4 Aqueous Reactions and Solution Stoichiometry
Chemistry, The Central Science, 11th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Solutions Chapter 4 and Solution Stoichiometry AP Chemistry 2014-15 North Nova Education Centre
More informationStoichiometry CHAPTER 12
CHAPTER 12 Stoichiometry 12.1 Using Everyday Equations Stoichiometry is the calculation of quantities in chemical equations. * The balanced equation gives the ratios for the reactants and products. 3 eggs
More informationChapter 4 Aqueous Reactions and Solution Stoichiometry
Chemistry, The Central Science, 11th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Chapter 4 and Solution Stoichiometry John D. Bookstaver St. Charles Community College Cottleville,
More informationTopics in composition stoichiometry include the calculation of: Molar mass Percent Composition Molecular formula Empirical formulas
Composition Stoichiometry Composition Stoichiometry NOTES 1 So far, we ve studied the products of a chemical reaction in terms of their identity. Stoichiometry is a branch of chemistry dealing with quantities.
More informationPage 1. Exam 2 Review Summer A 2002 MULTIPLE CHOICE. 1. Consider the following reaction: CaCO (s) + HCl(aq) CaCl (aq) + CO (g) + H O(l)
Page 1 MULTIPLE CHOICE 1. Consider the following reaction: CaCO (s) + HCl(aq) CaCl (aq) + CO (g) + H O(l) The coefficient of HCl(aq) in the balanced reaction is. a) 1 b) 2 c) 3 d) 4 e) 0 2. Given the information
More informationUnit 10 Solution Chemistry 1. Solutions & Molarity 2. Dissolving 3. Dilution 4. Calculation Ion Concentrations in Solution 5. Precipitation 6.
Unit 10 Solution Chemistry 1. Solutions & Molarity 2. Dissolving 3. Dilution 4. Calculation Ion Concentrations in Solution 5. Precipitation 6. Formula, Complete, Net Ionic Equations 7. Qualitative Analysis
More informationIGCSE Double Award Extended Coordinated Science
IGCSE Double Award Extended Coordinated Science Chemistry 4.1 - The Mole Concept The Atomic Mass Unit You need to know the atomic mass unit and the relative atomic mass. In Unit C3.3, 1 atomic mass unit
More informationCHEM 171 EXAMINATION 1. October 9, Dr. Kimberly M. Broekemeier. NAME: Key
CHEM 171 EXAMINATION 1 October 9, 008 Dr. Kimberly M. Broekemeier NAME: Key I A II A III B IV B V B VI B VII B VIII I B II B III A IV A V A VI A VII A inert gase s 1 H 1.008 Li.941 11 Na.98 19 K 9.10 7
More information2. Indicators of Chemical Rxns. Abbreviations of State (g) gas (l) liquid (s) solid (aq) aqueous a substance dissolved in water
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationChapter 3: Solution Chemistry (For best results when printing these notes, use the pdf version of this file)
Chapter 3: Solution Chemistry (For best results when printing these notes, use the pdf version of this file) Section 3.1: Solubility Rules (For Ionic Compounds in Water) Section 3.1.1: Introduction Solubility
More informationEmpirical formula C 4 H 6 O
AP Chem Test- Titration and Gravimetric Analysis p. 2 Name date 4. Empirical Formula A compound is analyzed and found to contain 68.54% carbon, 8.63% hydrogen, and 22.83% oxygen. The molecular weight of
More informationSCH4U Chemistry Review: Fundamentals
SCH4U Chemistry Review: Fundamentals Particle Theory of Matter Matter is anything that has mass and takes up space. Anything around us and in the entire universe can be classified as either matter or energy.
More informationMultiple Choices: Choose the best (one) answer. Show in bold. Questions break-down: Chapter 8: Q1-8; Chapter 9: Q9-16: Chapter 10:
HCCS CHEM 1405 textbook PRACTICE EXAM III (Ch. 8-10) 5 th and 6 th edition of Corwin s The contents of these chapters are more calculation-oriented and are the beginning of learning of the chemical language.
More informationEIT Review S2007 Dr. J.A. Mack.
EIT Review S2007 Dr. J.A. Mack www.csus.edu/indiv/m/mackj/ Part 1 Atom: The smallest divisible unit of an element Compound: A substance made of two or more atoms Ion: A charged atom or molecule Cation:
More informationStoichiometry CHAPTER 12
CHAPTER 12 Stoichiometry 12.1 Using Everyday Equations Stoichiometry is the calculation of quantities in chemical equations. Jan 16 7:57 AM May 24 10:03 AM * The balanced equation gives the ratios for
More information1) 3.5x10 3 g sucrose 2) 1.1x10 3 g sucrose 3) 3.5 g sucrose 4) 4.4x10 3 g sucrose 5) 4.5 g sucrose
Form Code X NAME CHM 2045, Fall 2015, Exam 1 Review Packet (Broward Teaching Center) Final Packet Instructions: Do your best and don t be anxious. Read the question, re-read the question, write down all
More informationAP Chemistry Review Packet #3
AP Chemistry Review Packet #3 Warmup Given the reaction N 2 O 3(g) NO (g) + NO 2(g) H = +39.7 kj, predict the effect that each of the following changes will have on the given values N 2 O 3 NO NO 2 Keq
More informationCH101 Fall 2018 Discussion #7 Chapter 6 TF s name: Discussion Time:
Name: CH101 Fall 2018 Discussion #7 Chapter 6 TF s name: Discussion Time: Things you should know when you leave Discussion today: Dissolving ionic, polar, and non-polar compounds in water Mahaffy, 2e section
More informationPrecipitation Reactions
Precipitation Reactions Precipitation reactions are reactions in which a solid forms when we mix two solutions reactions between aqueous solutions of ionic compounds produce an ionic compound that is insoluble
More informationa. 36.9% b. 2.67% c. 50.4% d. 20.7% e. 12.7% 2. What is the atomic symbol for an element with 39 protons and 50 neutrons?
Name: Lab Section: Use a scantron to complete the exam. There is only one best answer for each question. Good luck 1. If a 21.00 gram sample of a Cu-Zn-Ni alloy contains 7.75 g Cu and 10.58 g Ni, what
More informationChemistry 104 Final Exam Content Evaluation and Preparation for General Chemistry I Material
Chemistry 104 Final Exam Content Evaluation and Preparation for General Chemistry I Material What is 25 mph in mm s 1? Unit conversions What is 1025 K in o F? Which is larger 1 ft 3 or 0.1 m 3? What is
More informationMass Relationships in Chemical Reactions
Mass Relationships in Chemical Reactions Chapter 3 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Micro World atoms & molecules Macro World grams Atomic mass
More informationChapter 8 Chemical Reactions
Chemistry/ PEP Name: Date: Chapter 8 Chemical Reactions Chapter 8: 1 7, 9 18, 20, 21, 24 26, 29 31, 46, 55, 69 Practice Problems 1. Write a skeleton equation for each chemical reaction. Include the appropriate
More informationChapter 4. The Major Classes of Chemical Reactions 4-1
Chapter 4 The Major Classes of Chemical Reactions 4-1 The Major Classes of Chemical Reactions 4.1 The Role of Water as a Solvent 4.2 Writing Equations for Aqueous Ionic Reactions 4.3 Precipitation Reactions
More informationChapter 4. Reactions in Aqueous Solution. Lecture Presentation. John D. Bookstaver St. Charles Community College Cottleville, MO
Lecture Presentation Chapter 4 in Solution 2012 Pearson Education, Inc. John D. Bookstaver St. Charles Community College Cottleville, MO Properties of Solutions Solute: substance in lesser quantity in
More information1. Parts of Chemical Reactions. 2 H 2 (g) + O 2 (g) 2 H 2 O(g) How to read a chemical equation
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationCHM 130LL: Double Replacement Reactions
CHM 130LL: Double Replacement Reactions One of the main purposes of chemistry is to transform one set of chemicals (the reactants) into another set of chemicals (the products) via a chemical reaction:
More information4. What is the mass of a mol sample of sodium hydroxide? A) g B) g C) g D) g E) g
Chem 101A Study Questions, Chapters 3 & 4 Name: Review Tues 10/4/16 Due 10/6/16 (Exam 2 date) This is a homework assignment. Please show your work for full credit. If you do work on separate paper, attach
More informationJOHN BURKE HIGH SCHOOL
JOHN BURKE HIGH SCHOOL Chemistry 2202 Midterm Examination January, 2013 Instructions: Part I: Multiple Choice: Choose the best answer to each item. Place all answers on the Answer Sheet provided. 40 marks
More informationAcids & Bases. Tuesday, April 23, MHR Chemistry 11, ch. 10
Acids & Bases 1 MHR Chemistry 11, ch. 10 Acid or base? 2 Make a chart like this: Strong v. Weak oncentrated v. Diluted 3 Acid Strength Acid strength depends on how much an acid dissociates. The more it
More informationChemical Reactions: An Introduction
Chemical Reactions: An Introduction Ions in Aqueous Solution Ionic Theory of Solutions Many ionic compounds dissociate into independent ions when dissolved in water H 2O NaCl(s) Na Cl These compounds that
More informationIntroductory Chemistry I Chemistry 1111 September 17, 2009 Hour Examination I Name There is a Periodic Table and a summary of solubility rules attached to the end of this examination. You may use a non-programmed
More informationC2.6 Quantitative Chemistry Foundation
C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen
More informationChapter 4. Reactions in Aqueous Solution. Solutions. 4.1 General Properties of Aqueous Solutions
Chapter 4 in Solution 4.1 General Properties of Solutions Solutions Solutions are defined as homogeneous mixtures of two or more pure substances. The solvent is present in greatest abundance. All other
More informationElectrolytes do conduct electricity, in proportion to the concentrations of their ions in solution.
Chapter 4 (Hill/Petrucci/McCreary/Perry Chemical Reactions in Aqueous Solutions This chapter deals with reactions that occur in aqueous solution these solutions all use water as the solvent. We will look
More information