A scientist mixes an unknown powder into a beaker of water. He then uses an indicator and finds that the pH of the resulting solution is 8.5. What can he infer from this observation?

The unknown powder was acidic.

The unknown powder decreased the hydrogen ion concentration of the water.

The indicator used can measure only basic solutions.

The powder contains hydrogen ions.

Question

Physics

Nicholas Carson

3 November, 15:29

A scientist mixes an unknown powder into a beaker of water. He then uses an indicator and finds that the pH of the resulting solution is 8.5. What can he infer from this observation?

The unknown powder was acidic.

The unknown powder decreased the hydrogen ion concentration of the water.

The indicator used can measure only basic solutions.

The powder contains hydrogen ions.

+5

Answers (1)

Know the Answer?

Dayami Park · Answer 1

A ph higher than 7 is basic so you can eliminate a. The indicator can be used to measure both acids and bases so you can eliminate c. Hydrogen ions are from acids, so the answer is that the powder decreased the hydrogen ions in the water.