Question

Complete the sentence. When an acid is added to water, hydrogen ions __________. Increase decrease stay the same disappear

Answer 1

Hydrogen ions increase but pH level decreases.

Answer 2

When an acid is added to water, hydrogen ions Increase.

Step-by-step explanation:

When an acid is added to water it dissociates into hydrogen ions and its conjugate base:

HA ⇔
`H^(+) + A^(-)`

Acid ⇔ hydrogen ions + conjugate base

As the acid dissociates, the concentration of hydrogen ions increase and so do the acidity of the solution.