When water was added to a white anhydrous substance X, the colour changed to blue. X is

Solubility curve can be used in the determination of the

If 0.2g of a salt is required to saturate 200\(cm^{3}\) of water at room temperature, what is the solubility of the salt?

The property of a chemical reaction that is affected by the presence of a catalyst is

Soluble salts can be prepared by the following methods except