Universal indicator

What does the pH scale measure?

What is the pH of a neutral solution?

• around 1 - 3

• around 5 - 7

• 7

• 9

A liquid has a pH of 1. What type of liquid is it?

• weak acids

• strong acids

• weak alkaline

• strong alkaline

Strong alkaline will have colour of universal indicator as....

what colour does Universal Indicator go in a liquid with pH of 4?

• red

• yellow

• green

• blue

Tick all the correct statements

• blue litmus paper will turn red in sodium hydroxide

• blue litmus paper will not change colour in sodium hydroxide

• red litmus paper will turn blue in sodium hydroxide

• red litmus paper will not change colour in sodium hydroxide

Litmus dye will change colour into purple in .... solution

Tick all the ingredients that can be made into common indicator.

• red cabbage

• apple

• blackcurrant

• beetroot

Arrange these solutions in order, with most alkaline first.

pH numbers: 2 8 6 3 12 7

Tick all the substances that are more acidic than baking soda.

• coffee

• ammonia solution

• water

• battery