Hard water deposits (calcium carbonate) have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits
A) ammonia
B) bleach (sodium hypochlorite)
C) lye (sodium hydroxide)
D) vinegar (acetic acid)

Question

Quizplus · Accepted Answer

Vinegar (acetic acid) is the best choice to dissolve calcium carbonate deposits. This is because vinegar is a weak acid that reacts with the calcium carbonate to form calcium ions, carbon dioxide, and water, ultimately dissolving the mineral buildup. The other substances listed (ammonia, bleach, and lye) are not effective in dissolving calcium carbonate deposits.

Hard Water Deposits (Calcium Carbonate) Have Built Up Around Your