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  • Help me please, Which one of the following processes will produce hard water?

Which one of the following processes will produce hard water?

  • Option 1)

    Saturation of water with CaCO_{3}         

  • Option 2)

    Saturation of water with MgCO_{3}

  • Option 3)

    Saturation of water with CaSO_{4}

  • Option 4)

    Addition of Na_{2}SO_{4} to water.

 

Answers (1)

best_answer

As we learnt in

Uses of Borate -

  1. As flux
  2. In water softening
  3. As antiseptic
  4. In making optical glasses and borosilicate glass
  5. In making enamels, glazing materials, stiffening of candles

-

 

 

Hard Water -

It contains calcium and Magnesium salt in the form of hydrogen carbonate , chloride and sulphate

- wherein

Hard water does not give Lathers with soap.

 

 When water passes over rocks containing sulphates or chlorides of both calcium or magnesium, it attains permanent hardness.


Option 1)

Saturation of water with CaCO_{3}         

This option is incorrect.

Option 2)

Saturation of water with MgCO_{3}

This option is incorrect.

Option 3)

Saturation of water with CaSO_{4}

This option is correct.

Option 4)

Addition of Na_{2}SO_{4} to water.

This option is incorrect.

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Aadil

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