A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation?

The solution contains an indicator that has a pH of 2.7.

The solid powder contained hydrogen ions.

The pH indicator was used incorrectly.

The powder increased the hydrogen ion concentration of the solution.

Question

A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation?

 The solution contains an indicator that has a pH of 2.7. 

 The solid powder contained hydrogen ions. 

 The pH indicator was used incorrectly. 

 The powder increased the hydrogen ion concentration of the solution.

anonymous · Answer

the powder increased the hydrogen ion concentration of the solution