Answer :

The correct option is O calcium

What are all the products created when the hydronium ion and limestone (CaCO3) react? In water, hydrogen ions interact with limestone (CaCO 3). Water always contains them since it goes through autoprotolysis: H + (aq) + OH - = H 2 O (l) (aq) Limestone will react and erode more readily the more acidic the water is.

When limestone is heated (calcined), it produces carbon dioxide and calcium oxide (quick lime). When this CaO, or calcium oxide, is combined with water, lime water (or calcium hydroxide), which releases heat, results. An EXOTHERMIC REACTION has occurred. When limestone and water are together, nothing happens. How does calcite purify water?

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