pH indicators

Tick the 3 pH indicators

• Phenolphthalein

• Litmus

• Hague Blue

• Methyl orange

Which of these is the pH of an acid?

• 3

• 7

• 10

• 12

Which of these is the pH of an alkali?

• 3

• 5

• 7

• 9

What colours do we see with phenolphthalein?

• red - orange

• colourless - pink

• red - orange - green - blue

• red - blue

What colours do we see with methyl orange?

• red - orange

• colourless - pink

• red - orange - green - blue

• red - blue

What colours do we see with litmus paper?

• red - orange

• colourless - pink

• red - orange - green - blue

• red - blue

What colours do we see with universal indicator?

• red - orange

• colourless - pink

• red - orange - green - blue

• red - blue

Lemon juice is an..?

• acid

• alkali

Drain cleaner is an..?

• acid

• alkali

Oven cleaner is an..?

• acid

• alkali