Y7 Acids and Bases Homework

What is the pH value of neutral solutions?

• Less than 7

• Exactly 7

• More than 7

• Exactly 14

What is the name of substances that change colour in acids and alkalis?

• Bases

• pH scale

• Indicators

• Salts

What is the pH value of acidic solutions?

• Exactly 14

• More than 7

• Exactly 7

• Less than 7

What happens when an acid and alkali neutralise each other?

• They produce a gas

• They produce a salt and water

• They produce a new acid

• They produce a new alkali

What is the pH value of alkaline solutions?

• Less than 7

• Exactly 7

• More than 7

• Exactly 14

What hazard symbol is this?

• Irritant

• Harmful

• Corrosive

• Flammable

What hazard symbol is this?

• Irritant

• Harmful

• Corrosive

• Flammable

What hazard is associated with concentrated acids?

• Harmful

• Corrosive

• Irritant

• Flammable

What hazard is associated with dilute acids?

• Harmful

• Corrosive

• Irritant

• Flammable

How can we find out the pH of a solution?

• Use an indicator

• Use the pH scale

• Neutralisation

• Use an acid