On this page you need to create notes that cover the following points:
  • Explain how the following indicators affected by acid, base and neutral substances:
    • Universal indicator paper/solution
    • Red litmus
    • Blue litmus
  • State are the colours of the pH scale and what pH levels are acid, base or neutral.

PH
Acid/Bace/Neutral
Strong/Weak
Universal
Indicator
Blue Litmus
Red Litmus
1
Acid
Strong acid
Red
Red
Red
2
Acid
Strong acid
Red
Red
Red
3
Acid
Medium acid
Orange
Red
Red
4
Acid
Medium acid
Orange
Red
Red
5
Acid
Weak acid
yellow
Red
Red
6
Acid
Weak acid
Green
Blue
Red
7
Neutral
-
Green
Blue
Red
8
Base
Weak base
Light blue
Blue
Blue
9
Base
Weak base
Light blue
Blue
Blue
10
Base
Medium base
Blue
Blue
Blue
11
Base
Medium base
Blue
Blue
Blue
12
Base
Strong base
Dark blue
Blue
Blue
13
Base
Strong base
Dark blue
Blue
Blue
14
Base
Strong base
Purple
Blue
Blue