Question

The compound insoluble in acetic acid is:
A. Calcium Oxide
B. Calcium Carbonate
C. Calcium Oxalate
D. Calcium Hydroxide

Answer 1

The compound is the most common cause of causing kidney stones as it is insoluble in nature and the substance found in foods like leafy, green vegetables which are combined with calcium.

Complete answer:
A.Calcium Oxide
Calcium oxide is used mostly in industry, like in making glass and porcelain; in sugar purifying; also in preparing bleaching powder, when it reacts with acetic acid, it forms calcium ethanoate (also known as acetate)
$Ca\left( {OH} \right){{_2 }} + {\text{ }}2C_2H_4O_2{\text{ }} \to {\text{ }}Ca\left( {C_2H_3O_2} \right){_2}{\text{ }} + {\text{ }}2H_2O{\text{ }}.$
Option A is incorrect
B. Calcium Carbonate
Calcium carbonate is a supplement used in diet form when the intake of calcium is not sufficient for the body. Calcium is important for healthy bones, muscles, nervous system, and heart. It is also used as an antacid to relieve acidity and indigestion. When it reacts with acetic acid, it forms calcium acetate with carbon dioxide and water.
$CaCO_3 + CH_3COOH \to Ca(CH_3COO)_2 + CO_2 + H_2O$
Option B is incorrect.
C. Calcium Oxalate
Calcium oxalate is insoluble in acetic acid, as it has high lattice energy and low solvation energy which makes it highly insoluble in acetic acid. Also, the salts of Oxalic acid are not decomposed by acetic acid as oxalic acid is quite stronger than acetic acid.
Hence, Option C is correct.
D. Calcium Hydroxide
Calcium hydroxide also known as slaked lime is an inorganic compound with the chemical formula $Ca(OH)_2$. It is a crystal which is colourless or white powder and is produced when quicklime is mixed, or slaked with water. It react with acetic acid and forms calcium acetate and water
$2CH_3COOH{\text{ }} + {\text{ }}Ca\left( {OH} \right)_2 \to Ca(CH_3COO)_2 + 2H_2O$
Option D is incorrect.

Note:
Oxalic acid is an organic compound which is a white solid crystalline that forms a colourless solution in water. But with acetic acid it does not react as oxalic acid is stronger than acetic acid.