Metallurgy — Chemistry STD 10 — Question

The following question relate to the electroplating of an article with silver.
What ions must be present in the electrolyte?

On heating, this salt changes from green to black.

Write the balanced equation for the preparation of the following compounds, starting from iron and other substance:
Iron (III) chloride

Name :
a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

For each compound mentioned above give the formulae of ions formed in aqueous solution.

The molecular weight of an element expressed in grams.

The preparation of Lead sulphate from Lead carbonate is a two-step process. (Lead sulphate cannot be prepared by adding dilute Sulphuric acid to Lead carbonate.)
What is the first step that is required to prepare Lead sulphate from Lead carbonate?

The process of coating thin layer of zinc over the surface of iron.

Write the balanced chemical equation for the following conversion:
Ammonium sulphate from ammonia and dilute sulphuric acid.