Question

Which could be true about an unknown sample with a pH of 7?

(2 points)

It contains only water.

It is highly acidic.

It has a very high hydroxide ion concentration.

It is a solution of HF and water.

Answer 1

It contains only water.

Step-by-step explanation:

Answer 2

Answer;

It contains only water.

Explanation;

• The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
• A pH of 7 is neutral. A solution with a pH of 7 is known as neutral solution, such a solution has equal concentration of H+ and OH- concentration. The OH- concentration balances the H+ concentrations in the solution making it neutral.
• Pure water is an example of a solution that is neutral, has a pH of 7.