Give equations to show how the following are made from their corresponding anhydrides.

(a) sulphurous acid

(b) phosphoric acid

(c) carbonic acid

(d) sulphuric acid

Name an acid used:

(a) to flavour and preserve food;

(b) in a drink

(c) to remove ink spots

(d) as an eyewash.

What do you understand by an alkali? Give two examples of :

(a) strong alkalis

(b) weak alkalis

What is the difference between an alkali and a base.