The colour of the precipitate produced by adding `NaOH` solution to `HgCl` is

The colour of the solid produced by adding SnCl_2 in excess to a solution of HgCl_2 is

Why did the colour of the phenolpthalein in NaOH solution change after adding the HCl solution ?

Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper [II] sulphate, zinc nitrate, lead nitrate, calcium chloride and iron [III] sulphate. For each of the aqueous salt solutions, state - a] the colour of the precipitate when NaOH is added in a small quantity,b] the nature of precipitate [i.e. soluble or insoluble, when NaOH is added in excess.

The colour of the solution obtained by adding excess of Kl in the solution of HgCl_2 is

When the solution of sodium carbonate is added to the solution of calcium chloride, a precipitate is formed. a. What is the colour of the precipitate formed? b. Name the precipitate. c. What is the type of the chemical reaction?