SCH3U - Solutions Chemistry

10 g of a solute is added to 1.00 L of pure water. Half of the added solute fails to dissolve. What can you conclude?

• The solution is saturated.

• The solution is supersaturated.

• The solution reached but did not pass its saturation level.

• The solution was initially unsaturated and then passed its saturation level.

Adding sodium sulfate to a solution that contains a single cation produces a precipitate. In a flame test, the solution produces a light-green flame. Which ion is most likely to be in the solution?

• Silver

• Calcium

• Zinc

• Copper

A 0.40 mol/L solution of sodium carbonate, Na₂CO₃(aq), completely dissociates in water. What will be the concentration of sodium ions in the solution?

• 0.40 mol/L

• 0.80 mol/L

• 0.20 mol/L

• 1.2 mol/L

Which of the following statements is true?

• Ionic compounds ionize; molecular compounds dissociate.

• Ionic compounds dissociate; molecular compounds ionize.

• Ionic compounds both dissociate and ionize; molecular compounds dissociate only.

• Ionic compounds and molecular compounds both ionize and dissociate.

Equal volumes of 1.0 mol/L solutions of hydrochloric acid, HCl(aq), and sodium hydroxide, NaOH(aq), are combined. Which of the following is true of the solution that results?

• The solution contains a dissolved ionic compound.

• Both anions are present in the solution.

• The resulting solution will be acidic.

• The resulting solution will be basic.

An opaque mixture of two solids could be a homogeneous solution.

• True

• False

As sodium chloride dissolves in water, each negative chloride ion gets surrounded by the oxygen ends of water molecules, completely hydrating the ion.

• True

• False

The phrase “like dissolves like” refers to the idea that polar solvents will dissolve non-polar solutes.

• True

• False

No gas bubbles are visible in a still, sealed bottle of pop because much of the carbon dioxide gas is dissolved.

• True

• False

When diluting a concentrated acid, always add the water to the acid.

• True

• False