Question

5. Which of the following are examples of precipitation reactions? Select all that apply.
OKCl(ag) + AgNO3(aq) → KNO3(aq) + AgCl(s)
OHCl(aq) + NaOH(ag) → H₂O(1) + NaCl(aq)
O2 H2(g) + O2(g) → 2 H₂0 (1)
Mg(s) + O2(g) → MgO2 (s)

Answer 1

$KCl(ag) + AgNO_3(aq)$ → $KNO_3(aq) + AgCl(s)$ is the precipitation reactions.

What are precipitation reactions?

A precipitate is an insoluble substance. A reaction in which insoluble solid precipitate is formed is called Precipitation Reaction.

For example, When Sodium Sulphate solution is mixed with Barium Chloride solution It forms Barium Sulphate and Sodium Chloride solution.

Precipitation reactions are usually double displacement reactions involving the production of a solid form residue called the precipitate.

These reactions also occur when two or more solutions with different salts are combined, resulting in the formation of insoluble salts that precipitate out of the solution.

Learn more about the precipitation reactions here:

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