Year 8 Acids & Alkalis

The pH scale is a measure of how .......... or alkaline a solution is. What one word completes the sentence?

What colour does litmus paper change into when dipped into acid?

• red

• blue

Complete the following sentence. An alkaline solution has a pH number greater than ...

Water has a pH of 7. This means that water is .......

If a solution has a pH of 14, how would you describe the solution?

• strong acid

• weak acid

• strong alkali

• weak alkali

• neutral

What colour is universal indicator solution in strong acid?

• purple

• blue

• green

• orange

• red

Citric acid is a

• weak acid

• strong acid

Which of the following solutions could have a pH of 12?

• water

• ethanoic acid

• lemon juice

• sodium hydroxide

Strong acids and strong alkalis are

• both able to turn litmus paper red

• corrosive

• sour

• sweet

If a solution has a pH of 1, how would you describe the solution?

• strong acid

• weak acid

• neutral

• weak alkali

• strong alkali