7.5 Water & Aqueous Systems

Multiple Choice

Fill in the blank: Larger particle size results in ______ dissolution rate.

• Slower

• Faster

• No change

• Variable

Multiple Choice

The solubility of most solid substances decreases as the temperature of the solvent increases.

• True

• False

Multiple Choice

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

• 83 grams

• 75 grams

• 40 grams

• 12 grams

Multiple Choice

How does a solution become supersaturated?

• dissolve lots of solute in it.
• dissolve a little solute in it. 
• dissolve more solute than you should be able to. 
• dissolve a solvent in it. 

Multiple Choice

A colloid is a mixture that contains undissolved particles. 

• True
• False

Multiple Choice

This type of mixture has particles that settle. 

• Suspension
• Colloid 
• Emulsion
• Solution 

Multiple Choice

A change in pressure has the greatest effect on the solubility of a solution that contains a

• gas in liquid

• solid in liquid

• liquid in a liquid

• liquid in a solid