Question

Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NOREACTION.
sodium chloride and lead (II) acetate

potassium sulfate and strontium iodide

chromium (III) nitrate and sodium phosphate

Answer 1

sodium chloride and lead (II) acetate
potassium sulfate and strontium iodide
chromium (III) nitrate and sodium phosphate

1.       2NaCl + Pb(CH3COO)2 → 2NaCH3COO + PbCl2

2.       K2SO4 + SrI2 → KI + SrSO4

3.       Cr(NO3)3 + Na3PO4 →CrPO4 + NaNO3

Answer 2

Answer: All the reactions are precipitation reactions.

Explanation:

Precipitation reaction is defined as the reaction in which an insoluble salt is formed when two solutions are mixed containing soluble substances. The insoluble salt settles down at the bottom of the reaction mixture.

For the given options:

Option 1: Sodium chloride and lead (II) acetate

The chemical equation follows:

$NaCl(aq.)+Pb(CH_3COO)_2(aq.)\rightarrow 2CH_3COONa(aq.)+PbCl_2(s)$

As, lead (II) chloride is forming as a solid product. It is considered as a precipitation reaction.

Option 2: Potassium sulfate and strontium iodide

The chemical equation follows:

$K_2SO_4(aq.)+SrI_2(aq.)\rightarrow 2KI(aq.)+SrSO_4(s)$

As, strontium sulfate is forming as a solid product. It is considered as a precipitation reaction.

Option 3: Chromium (III) nitrate and sodium phosphate

The chemical equation follows:

$Cr(NO_3)_3(aq.)+Na_3PO_4(aq.)\rightarrow 3NaNO_3(aq.)+CrPO_4(s)$

As, chromium (III) phosphate is forming as a solid product. It is considered as a precipitation reaction.

Hence, all the reactions are precipitation reactions.