Chapter 22: Solutions

Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water?

• Smaller crystals increase the surface area and slow down dissolving.
• Smaller crystals decrease the surface area and speed up dissolving.
• Smaller crystals increase the surface area and speed up dissolving.
• Smaller crystals decrease the surface area and slow down dissolving.

A solution of one solid metal in another is called a(n) __.

• mixture
• alloy
• supersaturated solution
• crystal

Which of the following will make a large crystal of rock salt dissolve faster in water?

• cooling
• using less water
• shaking
• using a larger salt crystal

Which of the following statements about solubility is generally true as the temperature decreases?

• The solubility of gases increases, while the solubility of solids decreases.
• The solubility of gases decreases, while the solubility of solids increases.
• The solubility of both gases and solids increases.
• The solubility of both gases and solids decreases.

Why is it dangerous to take large doses of some nonpolar vitamins?

• They are fat soluble and accumulate in body tissues.
• They are water soluble and become concentrated in body tissues.
• They cannot dissolve in fat and instead dissolve in the water inside body cells.
• These substances cannot be utilized by the body

Which of the following statements is true?

• Nonpolar solvents are useful for dissolving polar solutes.
• Polar solvents are useful for dissolving nonpolar solutes.
• Nonpolar solvents are not useful because they do not form solutions with water.
• Nonpolar solvents are useful for dissolving nonpolar solutes.

Because electrons are distributed equally, a hydrocarbon is ___.

• polar
• nontoxic
• nonpolar
• insoluble

A ___ is a large molecule made of carbon and hydrogen atoms.

• hydrogen oxide
• hydrocarbon
• solvent
• solute

What characteristic of water makes it the universal solvent?

• nonpolar
• large molecules
• long-chain hydrocarbon
• polar

Adding a solute to a solvent __ the freezing point of the solvent.

• raises
• lowers
• does not change
• doubles