Week 13 Quiz: Solutions and Solubility Curves

How many grams of K₂Cr₂O₇, are soluble in 100 g of water at 95 ºC?

• 83 grams
• 75 grams
• 40 grams
• 12 grams

Which solute does not increase in solubility as temperature rises?

• NH₃
• NaNO₃
• KNO₃
• NaCl

When 20 grams of potassium chlorate, KClO₃, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:

• supersaturated
• saturated
• unsaturated

The amount of solute that can dissolve in a given amount of solvent at a given temperature

• saturated solution

• solubility

• pure substance

• colloid

The ___ is the thing being dissolved.

• solute
• solvent
• mixture
• suspension

What is the most common solvent in everyday life?

• Ethanol
• Tuluene
• Water
• Oils

Kool-Aid is composed of flavoring, coloring, sugar, and water. Identify the solvent.

• water

• powder

• sugar

• powder and sugar

A _______ contains the maximum amount of dissolved solute under normal conditions.

• unsaturated solution

• supersaturated solution

• saturated solution

Oil will NOT dissolve in water. Which of the following best explains why?

• Water is a nonpolar molecule. Oil is a polar molecule and "like dissolves like" so their opposite polarities will not allow them to dissolve in each other since the polarities aren't alike.

• Water is a polar molecule. Oil is a nonpolar molecule and "like dissolves like" so their opposite polarities will not allow them to dissolve in each other since the polarities aren't alike.

• Water is a nonpolar molecule. Oil is a nonpolar molecule and "like dissolves like" so they have like (similar) polarities and they will not dissolve in each other.

• Water is a polar molecule. Oil is a polar molecule and "like dissolves like" so they have like (similar) polarities and they will not dissolve in each other.

Sugar WILL dissolve in water. Which of the following best explains why?

• Water is a nonpolar molecule. Sugar is a polar molecule and "like dissolves like" so their opposite polarities will make them dissolve in each other.

• Water is a polar molecule. Sugar is a nonpolar molecule and "like dissolves like" so their opposite polarities will make them dissolve in each other.

• Water is a nonpolar molecule. Sugar is a nonpolar molecule and "like dissolves like" so they have like (similar) polarities and they will dissolve in each other.

• Water is a polar molecule. Sugar is a polar molecule and "like dissolves like" so they have like (similar) polarities and they will dissolve in each other.