Write two balanced equations to describe the changes that occur when hard water is boiled.

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written 7.3 years ago by

teamques10 ★ 64k

• modified 7.3 years ago

FE > Semester 1 > Applied Chemistry 1

Marks : 03

Years : DEC 2015

engineering chemistry

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written 7.3 years ago by

teamques10 ★ 64k

when hard water is heated, $Ca^{2+}$ ions react with bicarbonate $(HCO_3^-) $ ions to form insoluble calcium carbonate (CaCO3), as shown in Equation 1.

enter image description here (1)

This precipitate, known as scale, coats the vessels in which the water is heated, producing the mineral deposits on your cooking dishes.

Which is removed by the separate reaction with $CO_3^{2-}$ ions from the soda ash

enter image description here (2)

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