KS3 Acids and Alkalis

What is an alkali also known as?

• An acid

• A base

• A salt

• An oxide

What pH value does an alkali typically have?

• Less than 7

• Equal to 7

• Greater than 7

• pH is not relevant to alkalis

Which of the following is a common use for alkalis?

• In shampoos

• As a food preservative

• In petrol

• In making plastics

What color does litmus paper turn when it comes into contact with an alkali?

• Red

• Blue

• Yellow

• Green

Which of the following is NOT a common alkali found in the lab?

• Sodium hydroxide - NaOH

• Potassium hydroxide - KOH

• Ammonium hydroxide - NH4OH

• Carbonic acid - H2CO3

What safety precautions should be taken when handling acids and alkalis?

• Hazchem (Hazardous Chemicals) Answers

• No precautions necessary

• Only use gloves

• Only use eye protection

Which of the following acids is commonly found in the lab?

• Acetic acid

• Citric acid

• Hydrochloric acid (HCl)

• Lactic acid

What does pH stand for?

• Potential of hydrogen

• Power of heat

• Purely hypothetical

• Pressure of hydration

What is the pH range that measures the alkalinity or acidity in a solution?

• 0 to 7

• 1 to 14

• 0 to 14

• 1 to 7

What pH value is considered neutral?

• 0

• 7

• 14

• 10