CH 13 Solutions All Practice Problems

Transcription

1 CH 13 Solutions All Practice Problems

2 CH 13 Solutions Practice #1 A chemical analysis shows that a sample contains grams of lead in 1.00 x 10 3 grams of water. Convert the measurement to parts per million (ppm). given grams solute given grams water = x parts solute 1.00 x 10 6 parts water FORMULA CARD

3 CH 13 Solutions Practice #1 A chemical analysis shows that a sample contains grams of lead in 1.00 x 10 3 grams of water. Convert the measurement to parts per million (ppm). given grams solute given grams water = x parts solute 1.00 x 10 6 parts water

4 CH 13 Solutions Practice #2 A chemical analysis of a water sample indicates that the water contains 6.50 x 10-4 grams of Mercury metal (Hg) per 2.00 Liters of water. Convert the measurement to parts per million (ppm). Density of water = 1.00 Kilogram / 1.00 L.

5 CH 13 Solutions Practice #3 A chemical analysis shows that a sample contains 8.8 milligrams of Cadmium in 4.00 x 10 4 grams of water. Convert the measurement to parts per billion (ppb). given grams solute given grams water = x parts solute 1.00 x 10 9 parts water FORMULA CARD

6 CH 13 Solutions Practice #4 A sample of well water contains grams of Benzene (C 6 H 6 ) in 8.00 x 10 5 grams of water. What is the concentration of Benzene in parts per billion (ppb).

7 CH 13 Solutions Practice #5 A chemical analysis shows that a sample contains 4.40 grams of lead in 1.00 x 10 3 grams of water. Calculate the Molarity (M) of the solution

8 CH 13 Solutions Practice #6 A chemical analysis shows that a sample contains grams of Sodium Chloride in 4.00 x 10 3 grams of water. Calculate the Molarity (M) of the solution

9 CH 13 Solutions Practice #7 In a sucrose solution, grams of Sucrose (C 12 H 22 O 11 ) is dissolved in 4.00 liters of water. Calculate the Molarity (M) of the solution

10 CH 13 Solutions Practice #8 A silver nitrate solution has a Molarity (M) of 3.00 M. Calculate the mass in grams required to make 6.00 Liters of this solution.

11 CH 13 Solutions Practice #9 A Glucose solution has a molarity (M) of 6.00 M. Calculate the volume in liters of water required to dissolve grams of glucose.

12 CH 13 Solutions Practice #10 Describe how you would prepare 2.00 Liters of 2.50 M Glucose water solution. (Use page 463 as an example)

13 Entropy Practice Problems (Answer in complete sentences) 1. How does the melting of an ice cube demonstrate the concept of Entropy? Explain in terms of entropy!

14 Entropy Practice Problems (Answer in complete sentences) 2. Why does a cold glass of lemonade become warm on a hot day? Explain in terms of entropy!

15 Entropy Practice Problems (Answer in complete sentences) 3. Why does a hot cup of tea cool down over time? Explain in terms of Entropy!

16 Entropy Practice Problems (Answer in complete sentences) 4. Each day the bell rings and the class is dismissed. Explain in terms of entropy what is going on!

17 Entropy Practice Problems (Answer in complete sentences) 5. I am sure you heard this at least once in your life; Now get in there and clean your room! Explain in terms of entropy what is going on before,during, and after you clean your room.

18 Entropy Practice Problems (Answer in complete sentences) 6. Give an example of entropy in your daily life. Explain!

19 CH 13 Solutions Practice Set #2, Question #1 Determine the solubility of the following compounds: (Page 472) a. NaCl at 50.0 o C b. KCl at 95.0 o C c. NaNO 3 at 40.0 o C d. KNO 3 at o C

20 CH 13 Solutions Practice Set #2, Question #2 Using Table Two on page 473, determine if the following compounds are soluble in water: a. KCl b. Sr(NO 3 ) 2 c. Ba(OH) 2 d. Mg 3 (PO 4 ) 2 e. AgCl f. CaSO 4 g. Na 2 CO 3

21 CH 13 Solutions Practice Set #2, Question #3 Determine how many grams of Potassium Nitrate (KNO 3 ) will precipitate out of solution as a saturated sample is cooled from o C to a new temperature of 20.0 o C (Page 472).

22 CH 13 Solutions Practice Set #2, Question #4 What is the relationship between the solubility of a gas dissolved in a liquid, and temperature?

23 CH 13 Solutions Practice Set #2, Question #5 What do we mean by Carbonated Beverage? Why over time do Carbonated Beverages go Flat?

24 CH 13 Solutions Practice Set #2, Question #8 If 1.10 grams of a gas dissolves in 2.00 liter of water at 20.0 kpa of pressure, what will the solubility (g/l) be at 115 kpa of pressure? S1 P1 = S2 P2

25 CH 13 Solutions Practice Set #2, Question #9 A gas has a solubility of 1.32 g/1.00 L at 10.0 atm of pressure. What is the pressure (atm) of a 1.00 liter sample that contains 3.00 grams of gas? S1 P1 = S2 P2

26 CH 13 Solutions Practice Set #2, Question #10 A sample of a major brand of soda has 2.20 grams of carbon dioxide dissolved in ml of liquid. At the same temperature and pressure, how many grams of carbon dioxide would dissolve in a 2.00 Liter bottle?

27 CH 13 Solutions Dilution Equation Lowering a concentration value by adding solvent M 1 V 1 = M 2 V 2 FORMULA CARD M 1 = Molarity of stock solution V 1 = Volume of stock solution M 2 = Molarity of dilute solution V 2 = Volume of dilute solution

28 CH 13 Solutions Practice Set #2, Question #12 What volume of 3.00 M KI stock solution would you use to make L of a 1.25 M KI solution? Significant Figures (Digits) Pages Skills Toolkit!

29 CH 13 Solutions Practice Set #2, Question #13 If you dilute 20.0 ml of a 3.50 M stock solution to make ml of a new solution, what is the Molarity (M) of the new solution? Significant Figures (Digits) Pages Skills Toolkit!

30 CH 13 Solutions Practice Set #2, Question #14 How many Liters of a 5.00 M H 2 SO 4 stock solution would you need to dilute to prepare ml of M H 2 SO 4? Significant Figures (Digits) Pages Skills Toolkit!

31 CH 13 Solutions Practice Set #2, Question #15 What Volume, in milliliters, of 3.00 M AgNO 3 stock solution would you use to make 2.00 L of 1.75 M AgNO 3 solution? Significant Figures (Digits) Pages Skills Toolkit!

32 CH 13 Solutions Practice Set #2, Question #16 What volume, in milliliters of 2.00 M calcium chloride (CaCl 2 ) stock solution would you use to make L of M calcium chloride solution?

33 CH 13 Solutions Practice Set #2, Question #17 Why do fish in lakes sometimes die of oxygen starvation during the summer months?

34 CH 13 Solutions Practice Set #2, Question #18 In an experiment, a glass bottle of soda and a plastic bottle of equal size both had a 0.50 Liter sample of soda placed inside and sealed? After one year of time, it was found that the plastic bottle had a mass 1.00 gram less then the glass bottle. What reasons can you think of to explain the change in mass?

35 CH 13 Solutions Practice Set #2, Question #19 How are electrolytes related to the electrical conductivity of a solution?

36 CH 13 Solutions Practice Set #2, Question #20 Determine if the following items are Acidic, Basic, or Neutral: a) Hydrochloric acid, ph = 0 b) Cola, ph = 3 c) Seawater, ph = 8 d) Baking Soda, ph = 9 e) Household ammonia solution, ph = 11 f) Urine, ph =6 g) Lemon juice, ph = 2 h) Vinegar, ph = 3.5 i) Normal rainwater, ph = 5 j) Oven cleaner, ph = 13 k) Milk of magnesia, ph = 10 l) Gatorade, ph = 4 m) Distilled water, ph = 7

37 CH 13 Solutions Practice Set #2, Question #21 Suppose you add grams of salt to a certain amount of water? What will happen to the boiling point of the water?

38 CH 13 Solutions Practice Set #2, Question #22 Why do you need to wash your hands with both soap and water after eating buttered popcorn?