Question

Name the reaction which forms insoluble salts.

Answer 1

Hint: As we know that the insoluble salts are basically those salts which does not dissolve in a solvent, within an on-going reaction. Therefore, Solubility is determined by the relative ability of solute to dissolve within a solvent.


Complete solution:
The compound which dissolves within a solution might be a solid, liquid, or gas and the relative ability of a solute to dissolve into a solvent is known as solubility and moreover the compound generally in a liquid that dissolves in solvent is called as solute.
When in a reaction, the solute is not fully dissolved in a liquid then precipitation occurs in the reaction. And the reaction is known as precipitation reaction. By definition we can say that a precipitation reaction states the formation of an insoluble salt once two solutions containing soluble salts are combined together and the insoluble salt that occurs out of solution is identified as the precipitate, therefore the reaction’s name is. The precipitation reactions lead to the formation of insoluble salts. And they are a type of double displacement reaction.
Thus, the Precipitation reactions transform ions into an insoluble salt in aqueous solution. For instance, the reaction between silver nitrate and potassium chloride results in the formation of potassium nitrate and silver chloride which is precipitated in the reaction and we can show this with the help of a chemical reaction as follow:
$AgN{O_3}(aq) + KCl(aq) \to AgCl(ppt) + KN{O_3}(aq)$

Therefore, the correct answer is the precipitation reaction which forms insoluble salts.


Note:This type of reaction occurs when two solutions which contain different type of salts and are mixed together, and so the cation or anion pair in the result combined in the solution forms an insoluble salt; this salt then precipitates out of the solution.