Junior Cert Chemistry: Acids and Bases

Acids turn litmus from...

• Blue to red

• Red to blue

Bases turn litmus from...

• Blue to red

• Red to blue

Methyl orange is an example of an acid-base indicator. What colour is this indicator in sodium hydroxide?

• Yellow

• Red

Phenolphthalein is an example of an acid-base indicator. What colour is this indicator in sodium hydroxide?

• Yellow

• Pink

• Colourless

• Red

Phenolphthalein is an example of an acid-base indicator. What colour is this indicator in hydrochloric acid?

• Yellow

• Pink

• Colourless

• Red

Methyl orange is an example of an acid-base indicator. What colour is this indicator in hydrochloric acid?

• Yellow

• Pink

• Colourless

• Red

Is HCl an acid or a base?

• Acid

• Base

Is H₂SO₄ an acid or a base?

• Acid

• Base

Is HNO₃ an acid or a base?

• Acid

• Base

Is NaOH an acid or a base?

• Acid

• Base