Chemistry Chapter 12: Solutions

All of the following are heterogeneous mixtures except

• whole wheat bread.

• granite.

• tap water.

• an oil-water mixture.an oil-water mixture.

What type of solute-solvent combination is carbon dioxide in water?

• gas-liquid

• liquid-gas

• liquid-liquid

• cannot be determined

What is the molarity of a solution that contains 0.202 mol KCl (molar mass = 74.55 g/mol) in 7.98 L of solution?

• 0.0132 M KCl

• 0.0253 M KCl

• 0.459 M KCl

• 1.36 M KCl

A solution containing 35 g of Li2SO4 dissolved in 100 g of water is heated from 10°C to 90°C. According to information in the figure, this temperature change would result in

• an additional 5 g of Li2SO4 in solution.

• an additional 30 g of Li2SO4 in solution.

• 5 g of Li2SO4 precipitate.

• no change in Li2SO4 concentration.

According to saturation curves shown in the figure, which of the following solutions is supersaturated?

• 40 g of NaCH3COO in 100 g of water at 40°C

• 140 g of NaCH3COO in 100 g of water at 80°C

• 80 g of NaCH3COO in 100 g of water at 40°C

• 80 g of NaCH3COO in 200 g of water at 40°C

A dissolved solute that does not form ions is

• a nonelectrolyte.

• a weak electrolyte.

• a strong electrolyte.

• insoluble.

How many moles of HCl (molar mass = 36.46 g/mol) are present in 0.70 L of a 0.33 M HCl solution?

• 0.23 mol

• 0.28 mol

• 0.38 mol

• 0.47 mol

If the temperature stays the same, the solubility of gases in liquids

• increases with increasing pressure.

• cannot reach equilibrium.

• decreases with increasing pressure.

• does not depend on pressure.

A NaOH solution contains 1.90 mol of NaOH (molar mass = 40.00 g/mol), and its concentration is 0.555 M. What is its volume?

• 0.623 L

• 0.911 L

• 1.05 L

• 3.42 L

Which type of mixture contains the smallest particles?

• emulsions

• solutions

• suspensions

• colloids