Test Yourself

Which of the following statements correctly describe a strong acid?

• Has a high pH value

• Ionises completely in water

• Has a high concentration of hydroxide ions

• Exists as molecules in water

The following table shows the pH values of four acidic solutions which have the same concentration. Which acidic solution has the highest degree of dissociation?

• K

• L

• M

• N

Which of the following substances ionise completely in water?

• Ammonia

• Ethanoic acid

• Ethanedioc acid

• Sodium hydroxide

Which of the following is NOT a chemical property of acids?

• Reacts with metal carbonate to produce salt, water and carbon dioxide gas

• Reacts with reactive metal to produce salt and hydrogen gas

• Reacts with base to produce salt and hydrogen gas

• Reacts with base to produce salt and water

Alkalis react with ammonium salt to produce salt, water and ammonia gas.

• True

• False

What happens when ammonium chloride reacts with calcium hydroxide?

• Blue litmus paper turns red

• Red litmus paper turns blue

• Red litmus paper remains unchanged

• Blue litmus paper remains unchanged