Indicators & pH scale

Which pH could belong to a strong acid?

• 14

• 8

• 5

• 1

Which pH could belong to a strong alkali?

• 14

• 8

• 5

• 1

Which pH could belong to a weak acid?

• 14

• 8

• 5

• 1

Which pH could belong to a weak alkali?

• 14

• 8

• 5

• 1

Which pH is neutral?

• 14

• 7

• 4

• 2

What is an indicator in Chemistry?

• Chemical dyes that can change colour according to pH

• A small light bulb on a car

• A chemical involved in a chemical reaction

• A substance used to neutralise an acid

How can you measure the pH of a substance?

• Use a pH probe

• Use universal indicator

• Use litmus paper

• Use phenolphthalein

What is a pH scale?

• A ranking of solutions based on whether they're an acid or base

• A scale from 0-100

• A measure of the mass of metal in a substance

• A ranking of solutions based on whether they're a metal

This is the pH scale of which indicator?

• Methyl orange

• Universal indicator

• Litmus solution

• Red cabbage indicator

Bleach is a

• Weak base

• Strong base

• Strong acid

• Weak acid