Solutions Practice Test

The molarity (M) of a solution is equal to the

• number of grams of solute/liter of solvent

• number of grams of solute/liter of solution

• number of moles of solute/liter of solvent

• number of moles of solute/liter of solution

• none are correct

What is the concentration of 10. moles of copper (II) nitrate in 5.0 liters of solution?

• 0.05M

• 2.0M

• 5.0M

• 10M

• none are correct

If 0.025 gram of Pb(NO₃)₂ is dissolved in 100. grams of H₂O, what is the concentration of the resulting solution, in parts per million?

• 2.5 ×10^-4 ppm

• 2.5 ppm

• 250 ppm

• 4.0 ×10³ ppm

• none are correct

How many total moles of KNO₃ must be dissolved in water to make 1.5 liters of a 2.0 M solution?

• 0.50 mol

• 2.0 mol

• 3.0 mol

• 1.3 mol

• none are correct

What is the molarity of 1.5 liters of an aqueous solution that contains 52 grams of lithium fluoride, LiF, (gram-formula mass = 26 grams/mole)?

• 1.3 M

• 2.0 M

• 3.0 M

• 0.75 M

• none are correct

Compared to pure water, a NaCl solution would have a:

• higher boiling point and higher freezing point

• lower boiling point and lower freezing point

• higher boiling point and lower freezing point

• lower boiling point and higher freezing point

• none are correct

When making Kool-Aid, the Kool-Aid powder would be the _________ and the water would be the ____________.

• solute; solvent

• solvent; solute

• solution; solvent

• solvent; solution

How many grams of KCl would have to be used to make 0.8 liters of a 3.0 M solution?

• 2.4 grams

• 229 grams

• 140 grams

• 179 grams

What is the concentration in ppm when 7.96 g of CH₄ are dissolved in 1500 g of solution?

• 5305 ppm

• 6208 ppm

• 5600 ppm

• 4825 ppm

As the temperature of the water increases, the solubility of solids generally ___________.

• increases

• decreases

• remains the same