Question

an equimolar solution of na2co3and nahco3 requires 12 ml of 0.1N H2SO4 using methyl orange as indicator. Amount of na2co3 in the solution?

Answer 1

Explanation:

To polish a gold ornament, it is dipped in a liquid called aqua regia (a mixture of hydrochloric acid and nitric acid). On getting the

environment of aqua regia, the outer layer of gold dissolves and the inner shiny layer appears. The dissolving of the layer causes a

reduction in the weight of the jewellery.