Understanding Solutions and Acids

In order for a solution to form,

• one substance must dissolve in another.

• a solid must dissolve in a liquid.

• the solvent must be water.

• a gas must dissolve in a liquid.

During the formation of a solution, energy is

• either released or absorbed.

• neither released nor absorbed.

• released only.

• absorbed only.

A student dissolved equal amounts of salt in equal amounts of warm water, room-temperature water, and ice water. Which of the following is true?

• The salt dissolved most quickly in the warm water.

• The salt dissolved most quickly in the room-temperature water.

• The salt dissolved most quickly in the ice water.

• none of the above

The maximum amount of a solute that will dissolve in a certain amount of solvent at a given temperature is that solute’s

• solubility.

• concentration.

• degree of saturation.

• rate of solution.

A solution that contains more solute than it would normally hold at that temperature is said to be

• saturated.

• unsaturated.

• supersaturated.

• concentrated.

Which of the following is NOT a property of an acid?

• tastes sour

• usually reacts with a metal

• changes the color of an indicator

• feels slippery

A base is defined as a compound that produces

• hydroxide ions in solution.

• hydrogen ions in solution.

• hydronium ions in solution.

• sodium ions in solution.

The salt that is formed during the reaction between potassium hydroxide and hydrochloric acid is

• NaCl

• H₂O

• KCl

• K₂Cl

An acid can be defined as

• a proton acceptor.

• a proton donor.

• neither a proton donor nor a proton acceptor.

• both a proton donor and a proton acceptor.

A small amount of acid is added to a buffer solution. The pH of the solution will

• increase.

• decrease.

• stay about the same.

• become neutral.