The pH of calcium carbonate is around 9.8
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Calcium carbonate is a basic substance, so its pH level is typically around 9-10 when dissolved in water.
The solubility of calcium carbonate decreases as pH increases. This is because calcium carbonate is more soluble in acidic conditions and less soluble in basic conditions.
When calcium carbonate reacts with hydrochloric acid, it produces carbon dioxide gas, water, and calcium chloride. The pH of the resulting solution would depend on the concentration of the acid, the amounts of reactants, and the specific conditions of the reaction. However, since calcium carbonate is a base and hydrochloric acid is an acid, the solution would likely be acidic with a pH less than 7.
Calcium magnesium carbonate does not have a constant pH as it can vary depending on factors such as concentration and the presence of other substances in solution. However, in general, it is considered to be basic in nature due to the carbonate ion's ability to accept protons.
Lime deposits are alkaline in nature. They are typically formed by calcium carbonate, which has an alkaline pH.
The pH level of calcium hydroxide is around 12-13, making it alkaline.