Question

Assertion: $NaHC{{O}_{3\,}}\,and\,KHC{{O}_{3}}$ exists in the solid state.
Reason: All metal ions are basic in nature.
A.Both assertion and reason are correct and the reason is the correct explanation of the assertion
B.Both assertion and reason are correct and the reason is not the correct explanation of the assertion
C.The assertion is correct but the reason is incorrect
D.An assertion is incorrect but the reason is correct

Answer 1

Before answering this question, we should first know something about Sodium bicarbonate and Potassium bicarbonate. Potassium bicarbonate ( $KHC{{O}_{3}}$) is a chemical compound that is made up of ${{K}^{+\,}}$ cation and $HC{{O}_{3}}^{-}$ anion. Sodium bicarbonate ($NaHC{{O}_{3}}$) comprises of $N{{a}^{+}}$ cation and $HC{{O}_{3}}^{-}$ anion.

Complete answer:
Potassium hydrogen carbonate is the IUPAC name of$KHC{{O}_{3}}$. It can exist as a white solid under certain conditions. It is a monopotassium salt of carbonic acid. It is alkaline. It can neutralize acid so it is used as an antacid.
Its preparation involves the treatment of an aqueous solution of potassium carbonate with carbon dioxide gas, Potassium bicarbonate is formed.
${{K}_{2}}C{{O}_{3}}+C{{O}_{2}}+\,{{H}_{2}}O\to \,2KHC{{O}_{3}}$
-963.2 Kilojoules per mole is the standard enthalpy of formation for this. Once it is heated to 120$^{\circ }C$, it undergoes a decomposition reaction to give water, carbon dioxide, and potassium carbonate.
The ions in Sodium bicarbonate are bonded with an ionic bond. It has a monoclinic crystalline structure which is powdery white. It is a weak base. It is commonly known as baking soda and can be used in cooking. Its pH value is 8.31. It is insoluble in ethanol but can be dissolved a little in methanol and acetone.
As the metals from Group 1 are strongly basic, they form solid bicarbonates except for lithium. No other group forms solid bicarbonates. So the assertion is correct.
All metal ions are basic which is true but not the explanation for assertion.

Therefore, the correct option is (B) Both assertion and reason are correct and the reason is not the correct explanation of assertion.

Note:
$KHC{{O}_{3}}$ is used as a leavening agent in the baking process. It is also used as a component in dry fire extinguishers. It also controls the pH of different medicines.
$NaHC{{O}_{3}}$ is used as a water softener. It also helps to kill the pest. It is also used in cosmetics, ear drops, etc.