Ermms just cant get my head around this question

kinda bugging me :(

Solid Sodium Hydrogen dissolving in water
i know its a dissociation reaction but i don't really have an idea where to split the compound.

3 answers

There is no such compound as "sodium hydrogen". Perhaps you mean sodium hydroxide (NaOH).

In water, it dissolves and dissociates into Na+ and OH-
Sorry i meant Sodium Hydrogen Carbonate(s)
NaHCO3 is also known as sodium bicarbonate. It dissociates into Na+ and HCO3- Some of the HCO3- will combine with H+ in the water to form H2O and CO2