The pH scale (AQA GCSE Chemistry Combined Science): Flashcards

0 to 14

How acidic or alkaline a solution is

Less than 7

Exactly 7

More than 7

$H^+$ ions (hydrogen ions)

$OH^-$ ions (hydroxide ions)

Universal indicator

pH probe

$H^+(aq) + OH^-(aq) \rightarrow H_2O(l)$

Water

7 (neutral)