Science Form 2 Chapter 6: Acids and Alkalis

What is the pH of distilled water?

• pH 12

• pH 3

• pH 8

• pH 7

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

• Catalyst

• Salt

• Universal Indicator

• Water

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

• Vinegar

• Bleach

• Baking soda

• Distilled water

Which substance is an acid?

• Water

• Bleach

• Orange juice

• Washing powder

Which pH levels indicated a strong acid?

• 1-3

• 4-6

• 8-11

• 12-14

Which pH level indicates a strong alkali?

• 1-3

• 4-6

• 8-11

• 12-14

Acids taste...

• Sweet

• Salty

• Sour

• Smooth

Alkalis feel...

• Rough

• Granulated

• Soapy

• Smooth

What does this hazard symbol mean?

• toxic

• flammable

• corrosive

• explosive

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid