JAMB Chemistry 2024 Paper

Concept:Water glass is another name for sodium silicate, a compound formed from sodium oxide and silica.Explanation:Water glass is a soluble glassy substance with the chemical formula $\mathrm{Na}_2\mathrm{SiO}_3$.It contains the silicate ion $\mathrm{SiO}_3^{2-}$, known as trioxosilicate(IV).Since the cation is sodium, the main constituent is sodium trioxosilicate(IV).The other options contain calcium or sulphate groups, which are not found in water glass.Answer:D. sodium trioxosilicate(IV)