Question

For, $Ca{\left( {HC{O_3}} \right)_2}$ is
$\left( A \right)$ A molecule
$\left( B \right)$ A mixture of compounds
$\left( C \right)$ An isotope
$\left( D \right)$ An isomer
$\left( E \right)$ An acid salt

Answer 1

Acid salts are the salts which dissolved in a solvent to produce an acidic solution. Its formation as a substance has a greater electric conductivity than that of the pure solvent. Acid salts are produced during the partial neutralization of diprotic or polyprotic acids.

Complete step by step answer:
We have to know the calcium bicarbonate $Ca{\left( {HC{O_3}} \right)_2}$ is which of the following options is correct. The acid salts have one or more alkali or alkaline earth metal ions as well as a one or more hydrogen atom. Well known example are sodium bicarbonate $\left( {NaHC{O_3}} \right)$ , sodium hydrosulfide $\left( {NaHS} \right)$
When calcium bicarbonate $Ca{\left( {HC{O_3}} \right)_2}$ is dissolve in the solvent it get dissociates into calcium ions $\left( {C{a^{2 + }}} \right)$ and bicarbonate ions $\left( {HCO_3^ - } \right)$ and further dissolved carbon dioxide $\left( {C{O_2}} \right)$ and carbonate $\left( {CO_3^{2 - }} \right)$ . It follows from the solution protic $\left( {{H^ + }} \right)$ in nature thus, by neutralization (strong acid and weak base).
Hence, the option $\left( E \right)$ is correct.

Additional information: In the reverse process, dissolve carbon dioxide $\left( {C{O_2}} \right)$ in rain water $\left( {{H_2}O} \right)$ reacts with limestone calcium carbonate $\left( {CaC{O_3}} \right)$ to from soluble calcium bicarbonate $\left( {Ca{{\left( {HC{O_3}} \right)}_2}} \right)$ . The soluble compound is then washed away with the rain water. This form of weathering is called carbonation. Molar mass calcium bicarbonate $\left( {Ca{{\left( {HC{O_3}} \right)}_2}} \right)$ is $162.1146\,\dfrac{g}{{mol}}$ and the color is white at room temperature. It is soluble in water.

Note:
A salt which contains oxygen $\left( {{O_2}} \right)$ or hydroxide ion $\left( {O{H^ - }} \right)$ in the molecules is called basic salt. Acidic salt which is formed by the neutralization of strong acid and weak base is called acidic salts, its aqueous solution turns blue litmus in red.