Question

hard water contains what ions​

Answer 1

Explanation:

In a hard water, generally the cations are found which includes ca2+ and Mg2+

Answer 2

Answer:

Ca2+ and Mg2+

Explanation:

Common cations found in hard water include Ca2+ and Mg2+. These ions enter a water supply by leaching from minerals within an aquifer. Common calcium-containing minerals are calcite and gypsum. A common magnesium mineral is dolomite (which also contains calcium).