KS3 Acids and Alkalis

What is the pH of distilled water?

• pH 12

• pH 3

• pH 8

• pH 7

What colour does litmus paper turn when added to an alkali?

• Blue

• Red

• Green

• Colourless

What colour does litmus paper turn when added to an acid?

• Blue

• Red

• Green

• Colourless

What other laboratory substance can you use to test if colourless substance is an acid or an alkali?

• Catalyst

• Salt

• Universal Indicator

• Water

Which of the following substance is an alkali?

• Vinegar

• Distilled water

• Baking soda

• Lime juice

What ions make up an acid?

• H⁺

• OH^-

• O⁺

• C^-

Tags

NGSS.MS-PS1-1

What ions make up an alkali?

• H⁺

• OH^-

• O⁺

• C^-

Tags

NGSS.MS-PS1-5

What happens to the pH of an acid during neutralisation?

• It stays the same

• It moves toward pH 1

• It moves towards pH 7

• It moves towards pH 14

A wasp sting is alkali. Which substance would neutralise the sting?

• Vinegar

• Bleach

• Baking soda

• Distilled water

Antacids are used to help indigestion by neutralising stomach acid. What substances is in the medicine?

• Acid

• Alkali

• Neutral