Logarithmic scale: pH scale
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Examples
Lessons
- Pure water has a pH of 7. Vinegar has a pH of 3.
Complete the following 2 sentences:
(i) Pure water is __________ times as alkaline as vinegar.
(ii) Vinegar is __________ times as acidic as pure water.
- Lemon juice has a pH of 2.5.
Stomach acid is 8 times more acidic than lemon juice.
Tomato juice is 90 times more basic than lemon juice
Find the pH of:
(i)stomach acid
(ii) tomato juice
