C4 revision

An acidic solution contains a high concentration of _________

• OH- ions

• H+ ions

• None of these

• CH4 molecules

An alkali ionises in water to release OH- ions

• True

• False

Which of these in an example of an alkali?

• H2

• cH4

• HCl

• NaOH

An acid base reaction is known as a ____________ reaction

• Decomposition

• Neutralisation

• Combustion

• Displacement

A strong acid has a pH of around?

• 1-3

• 5-6

• 8-9

• 11-14

Acids react with metal carbonates to form _______________.

• Salt + water

• Salt + hydrogen

• Salt + water + carbon dioxide

• None of the above

When hydrochloric acid reacts with a metal, which salt is formed?

• Nitrate

• Sulphate

• Chloride

• None of these

Copper oxide neutralises an acid, but doesn't dissolve in water, therefore it is _____________

• an alkali

• a base

In the required practical we added CuO to the solution __________

• in solution

• in excess

• soluble

• none of these

We can speed up acid reactions by:

1) increasing the temperature of the solutions

2) increasing the concentration of the acids.

• True

• False