Question

Write the chemical name and chemical formula of the salt used to remove

permanent hardness of water.​

Answer 1

Answer:

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Explanation:

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Answer 2

Permanent hardness of water can be removed by the following methods: Method # 1. Lime-Soda Process: In this method lime [Ca (OH) 2] and sodium carbonate [Na 2 CO 3] (or soda ash) are used to remove permanent hardness from water.