Unit 10 Review

Which of the following is a solute in the solution according to the chart?

• Nitrogen

• Carbon dioxide

• Table Salt

• Iron

Which of the following is a solvent in the solution according to the chart?

• Nitrogen

• Carbon dioxide

• Table Salt

• Iron

Which factor best explains why a scuba diver must come up from the water slowly?

• Increased pressure increased the amount of gasses dissolved in their blood.

• Increased pressure decreased the amount of gasses dissolved in their blood.

• Decreased temperature increased the amount of gasses dissolved in their blood.

• Decreased temperature decreased the amount of gasses dissolved in their blood.

Which of the following scenarios would affect the rate at which a solid dissolves?

• Lowering the temperature of the solvent.

• Using large rock salt instead of small table salt.

• Increasing the pressure of the system.

• Stirring the solid solute in the solvent.

What would happen if you stirred 100 g of Gatorade powder in 100g of water at 25°C when only 90 g of Gatorade powder can dissolve in 100 g of water at 25°C?

• Nothing (Solution is unsaturated).

• 10 g of Gatorade powder would precipitate out.

• The solution would be supersaturated.

• The solution would immediately crystalize.

30 g of potassium nitrate was dissolved in 100 g of 30°C water. It was then allowed to cool undisturbed to 15°C. What best describes the solution?

• Unsaturated

• Saturated

• Supersaturated

• Desolate

30 g of potassium nitrate was dissolved in 100 g of 45°C water. What best describes the solution?

• Unsaturated

• Saturated

• Supersaturated

• Desolate

30 g of potassium nitrate was dissolved in 100 g of 50°C water. What best describes the solution?

• Unsaturated

• Saturated

• Supersaturated

• Desolate

What best describes what pH is a measure of?

• The concentration of hydrogen ions in solution.

• The concentration of hydroxide ions in solution.

• The concentration of oxygen ions in solution.

• The concentration of salts in soluton.

The higher the concentration of hydrogen ions, the (a)   the pH value.