Ph Rainbow

Question 1

What happens with universal indicator ?

Answer 1

1. When universal indicator is added to a strong acid it becomes red.
2. When universal indicator is added to a neutral substance it becomes green. 3. When universal indicator is added to a strong alkali it becomes purple.

Question 2

What are the categories in the Ph scale ?

Answer 2

1. Strong acids = Red
2. Weak acids = Orange to yellow
3. Neutral substances = Green
4. Weak alkali = Blue
5. Strong acids = Purple