Question

How is washing soda prepared from sodium carbonate? Give its chemical
equation. State the type of this salt. Name the type of hardness of water
which can be removed by it?​

Answer 1

Answer:

Read the attachment.

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Answer 2

Answer:

Washing soda is sodium carbonate containing 10 molecules of water of crystallisation.It is called as sodium carbonate decahydrate.

Equation-

Na2CO3 + 10H2O → Na2CO3•10H2O

Sodium carbonate is an organic sodium salt and a carbonate salt. Sodium Carbonate is the disodium salt of carbonic acid with alkalinizing property. When dissolved in water, sodium carbonate forms carbonic acid and sodium hydroxide.

It can remove temporary and permanent hardness from water. Sodium carbonate is soluble but calcium carbonate and magnesium carbonate are insoluble. The water is softened because it no longer contains dissolved calcium ions and magnesium ions.

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