Question

a) whats the reaction for aqeuous lead (II) nitrate reacting with sodium chromate?

b) what's the color and formula for the colored product formed?

c) how could the production of a colored product be used to find the amount of lead within the water?

Answer 1

We will answer this question one by one

First we have 2 chemicals

01. Lead nitrate - Pb(NO₃)₂

02. Sodium chromate - Na₂CrO₄

now

Question a)

Reaction

Pb(NO₃)₂ + Na₂CrO₄ ---> PbCrO₄ + 2 NaNO₃

02. Color and formula of the product formed

As seen from the reaction the product formed is

Lead Chromate

Formula - PbCrO₄

Color - yellow

C)

The amount of lead in the water can be detected by the same reaction shown above

The yellow colour formed can tell us about the concentration of Lead

For this we have to draw a standard curve and plot our given reading to find the concentration

I hope this helps. If you have any query or want more detailed explanation, feel free to ask in the comments section below.