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.
