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Solving Problems: A Chemistry Handbook
Chemistry: Matter and Change
25
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER
3
Practice Problems
4. A sealed glass tube contains 2.25 g of copper and 3.32 g of sulfur. The mass of the tube and its contents is 18.48 g. Upon
heating, a reaction forms copper(II) sulfide (CuS). All of the
copper reacts, but only 1.14 g of sulfur reacts. Predict what the
mass of the tube and its contents will be after the reaction is
completed. Explain your reasoning.
5. When heated, calcium hydroxide and ammonium chloride react
to produce ammonia gas, water vapor, and solid calcium chloride. Suppose 5.00 g of calcium hydroxide and 10.00 g of
ammonium chloride are mixed in a test tube and heated until no
more ammonia is given off. The remaining material in the test
tube has a mass of 10.27 g. What total mass of ammonia and
water vapor was produced in the reaction?
6. When a solution of barium nitrate and a solution of copper(II)
sulfate are mixed, a chemical reaction produces solid barium
sulfate, which sinks to the bottom, and a solution of copper(II)
nitrate. Suppose some barium nitrate is dissolved in 120.00 g of
water and 8.15 g of copper(II) sulfate is dissolved in 75.00 g of
water. The solutions are poured together, and a white solid
forms. After the solid is filtered off, it is found to have a mass
of 10.76 g. The mass of the solution that passed through the filter is 204.44 g. What mass of barium nitrate was used in the
reaction?
7. A reaction between sodium hydroxide and hydrogen chloride
gas produces sodium chloride and water. A reaction of 22.85 g
of sodium hydroxide with 20.82 g of hydrogen chloride gives
off 10.29 g of water. What mass of sodium chloride is formed
in the reaction?
Solving Problems: A Chemistry Handbook
Chemistry: Matter and Change
25
SOLVING PROBLEMS:
A CHEMISTRY HANDBOOK
CHAPTER
3
Practice Problems
4. A sealed glass tube contains 2.25 g of copper and 3.32 g of sulfur. The mass of the tube and its contents is 18.48 g. Upon
heating, a reaction forms copper(II) sulfide (CuS). All of the
copper reacts, but only 1.14 g of sulfur reacts. Predict what the
mass of the tube and its contents will be after the reaction is
completed. Explain your reasoning.
5. When heated, calcium hydroxide and ammonium chloride react
to produce ammonia gas, water vapor, and solid calcium chloride. Suppose 5.00 g of calcium hydroxide and 10.00 g of
ammonium chloride are mixed in a test tube and heated until no
more ammonia is given off. The remaining material in the test
tube has a mass of 10.27 g. What total mass of ammonia and
water vapor was produced in the reaction?
6. When a solution of barium nitrate and a solution of copper(II)
sulfate are mixed, a chemical reaction produces solid barium
sulfate, which sinks to the bottom, and a solution of copper(II)
nitrate. Suppose some barium nitrate is dissolved in 120.00 g of
water and 8.15 g of copper(II) sulfate is dissolved in 75.00 g of
water. The solutions are poured together, and a white solid
forms. After the solid is filtered off, it is found to have a mass
of 10.76 g. The mass of the solution that passed through the filter is 204.44 g. What mass of barium nitrate was used in the
reaction?
7. A reaction between sodium hydroxide and hydrogen chloride
gas produces sodium chloride and water. A reaction of 22.85 g
of sodium hydroxide with 20.82 g of hydrogen chloride gives
off 10.29 g of water. What mass of sodium chloride is formed
in the reaction?