Chapter 16, Problem 106A

Interpretation Introduction

Interpretation: The difference between the dissolving of limestone and solvation is to be explained.

Concept Introduction:

Calcium carbonate ${\text{CaCO}}_{\text{3}}$ is present in rocks. Salt beds are shallow and thin formation formed when salt like ${\text{CaCO}}_{\text{3}}$ penetrate in the land. This bed height is around $1000\text{ft}$ . Sinkholes are depressions that have no external drainage surface, which means it looks like a pit where the rainwater is remain inside these holes.

Explanation of Solution

Dissolution of substances is the process where the solute (either in a solid, liquid, or gaseous state) dissolves in the solvent (liquid) to form a solution.

Solvation is the process where the solvent molecule interacts with the solute molecules.

Limestone is called calcium carbonate which is insoluble in water. But still, this can be dissolved in water to form limestone caves/sinkholes. This is because of the microbial decomposition and root respiration of the nearby plants which adds carbon to the water, thereby reducing the pH.

Here the ${\text{CaCO}}_{\text{3}}$ water is the solvent that interacts with the above solute particles which are termed solvation, later the solution of a dissolved state forms depression i.e., sinkholes.