A Level Chemistry 9701/12/O/N/20 Q19
Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic solution.
A solution is prepared by reacting 0.100 g of compound X with an excess of water. This solution is neutralised by exactly 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution.
What could be the identity of compound X?