The answer would be: <span> vinegar (acetic acid).
To dissolve deposit that calcified, you need to dissolve the calcium. Calcium is one of the metal that makes base pH. It will react with acid compound and produce a molecule of water. Ammonia, bleach, lye </span><span>, and baking soda are all base and won't react with the </span><span>calcium carbonate. Vinegar is acid and will react to it.
Vinegar would be most effective in dissolving the deposits of Hard Water.
Vinegar (CH₃COOH) is a weak acid, while Calcium Carbonate (CaCO₃), being the salt of a weak acid, will be a weak base. These two compounds will react together in the following way:
2CH₃COOH + CaCO₃ → (CH₃COO)₂Ca + H₂CO₃
H₂CO₃ reacts further to yield Water and CO₂
H₂CO₃ → H₂O + CO₂(g)
So, vinegar would be effective at dissolving CaCO₃, and we should see bubbles as a proof that a reaction has occurred. Have a nice day!
We have that every gas satisfies the fundamental gas equation, PV=nRT where P is the Pressure, V is the volume of the gas, n are the moles of the gas, R is a universal constant and T is the Temperature in Kelvin. We have that PV/T=nR and during our process, the moles of the gas do not change (no argon enters or escapes our sample). See attached.
