CH 13 Solutions All Practice Problems · CH 13 Solutions Practice #2 A chemical analysis of a water...

CH 13 SolutionsAll Practice Problems

CH 13 Solutions Practice #1

A chemical analysis shows that a sample contains 0.0044 grams of lead in 1.00 x 103 grams of water. Convert the measurement to parts per million (ppm).

given grams solutegiven grams water

=x parts solute

1.00 x 106 parts waterFORMULA CARD

A chemical analysis shows that a sample contains 0.0044 grams of lead in 1.00 x 103 grams of water. Convert the measurement to parts per million (ppm).

=x parts solute

1.00 x 106 parts water

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.

A chemical analysis shows that a sample contains 8.8 milligrams of Cadmium in 4.00 x 104 grams of water. Convert the measurement to parts per billion (ppb).

=x parts solute

1.00 x 109 parts water

FORMULA CARD

A sample of well water contains 0.0025 grams of Benzene (C6H6) in 8.00 x 105 grams of water. What is the concentration of Benzene in parts per billion (ppb).

A chemical analysis shows that a sample contains 4.40 grams of lead in 1.00 x 103 grams of water. Calculate the Molarity (M) of the solution

A chemical analysis shows that a sample contains 117.0 grams of Sodium Chloride in 4.00 x 103 grams of water. Calculate the Molarity (M) of the solution

In a sucrose solution, 360.0 grams of Sucrose (C12H22O11) is dissolved in 4.00 liters of water. Calculate the Molarity (M) of the solution

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.

A Glucose solution has a molarity (M) of 6.00 M. Calculate the volume in liters of water required to dissolve 540.0 grams of glucose.

Describe how you would prepare 2.00 Liters of 2.50 M Glucose water solution. (Use page 463 as an example)

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!

2. Why does a cold glass of lemonade become warm on a hot day? Explain in terms of entropy!

3. Why does a hot cup of tea cool down over time? Explain in terms of Entropy!

4. Each day the bell rings and the class is dismissed. Explain in terms of entropy what is going on!

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.

6. Give an example of entropy in your daily life. Explain!

CH 13 Solutions Practice Set #2, Question #1

Determine the solubility of the following compounds: (Page 472)a. NaCl at 50.0 oC

b. KCl at 95.0 oC

c. NaNO3 at 40.0 oC

d. KNO3 at 100.0 oC

Using Table Two on page 473, determine if the following compounds are soluble in water:

a. KCl b. Sr(NO3)2 c. Ba(OH)2 d. Mg3(PO4)2

e. AgClf. CaSO4

g. Na2CO3

Determine how many grams of Potassium Nitrate (KNO3) will

precipitate out of solution as a saturated sample is cooled from 100.0 oC to a new temperature of 20.0 oC (Page 472).

What is the relationship between the solubility of a gas dissolved in a liquid, and temperature?

Why over time do Carbonated Beverages go “Flat”?

What do we mean by “Carbonated Beverage”?

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?

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?

A sample of a major brand of soda has 2.20 grams of carbon dioxide dissolved in 454.00 mL of liquid. At the same temperature and pressure, how many grams of carbon dioxide would dissolve in a 2.00 Liter bottle?

CH 13 Solutions Dilution Equation

Lowering a concentration value by adding solvent

M1V1 = M2V2

M1 = Molarity of stock solutionV1 = Volume of stock solutionM2 = Molarity of dilute solutionV2 = Volume of dilute solution

FORMULA CARD

What volume of 3.00 M KI stock solution would you use to make 0.300 L of a 1.25 M KI solution?

Significant Figures (Digits) Pages 57-58 Skills Toolkit!

If you dilute 20.0 mL of a 3.50 M stock solution to make 100.0 mL of a new solution, what is the Molarity (M) of the new solution?

How many Liters of a 5.00 M H2SO4 stock solution would you need to dilute to prepare 100.0 mL of 0.250 M H2SO4?

What Volume, in milliliters, of 3.00 M AgNO3 stock solution would you use to make 2.00 L of 1.75 M AgNO3 solution?

What volume, in milliliters of 2.00 M calcium chloride (CaCl2) stock solution would you use to make 0.500 L of 0.300 M calcium chloride solution?

Why do fish in lakes sometimes die of oxygen starvation during the summer months?

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?

How are electrolytes related to the electrical conductivity of a solution?

Determine if the following items are Acidic, Basic, or Neutral:

a) Hydrochloric acid, pH = 0b) Cola, pH = 3c) Seawater, pH = 8d) Baking Soda, pH = 9e) Household ammonia solution, pH = 11 f) Urine, pH =6g) Lemon juice, pH = 2h) Vinegar, pH = 3.5i) Normal rainwater, pH = 5j) Oven cleaner, pH = 13k) Milk of magnesia, pH = 10l) Gatorade, pH = 4m) Distilled water, pH = 7

Suppose you add 100.0 grams of salt to a certain amount of water? What will happen to the boiling point of the water?

Why do you need to wash your hands with both soap and water after eating buttered popcorn?

CH 13 Solutions All Practice Problems · CH 13 Solutions Practice #2 A chemical analysis of a water...

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