Question

When Potassium iodide solution is added to a solution of lead nitrate in a test
tube , a precipitate is formed.
(a)What is the colour of the precipitate?
(b)Name the compound which is precipitated.
(c)Write the balanced chemical equation for this.
(d)When lead (ii) nitrate is heated,which gas is released and what is its colour
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Answer 1

Answer:

a.A precipitate is a solid product that forms from a reaction and settles out of a liquid solution. The formation of a precipitate is an indication of a chemical reaction. A yellow precipitate of solid lead (II) iodide forms immediately when solutions of lead (II) nitrate and potassium iodide are mixed.

b.If silver nitrate solution is poured into a solution of sodium chloride, a chemical reaction occurs forming a white precipitate of silver chloride. When potassium iodide solution reacts with lead(II) nitrate solution, a yellow precipitate of lead(II) iodide is formed.

d.Lead nitrate crystals on strong heating decompose to form lead monoxide, nitrogen dioxide gas and oxygen gas.