Question

Name the procedure used to prepare a sodium salt such as sodium sulphate.

Answer the following question related to salts and their preparations:

Name the procedure used to prepare a sodium salt such as sodium sulphate.

Answer 1

The name of the procedure used to prepare a sodium salt such as sodium sulphate is Neutralization of acid with base.

Answer 2

By neutralising alkali with acid. Pour the calculated 25 cm³ of NaOH into the flask. Using a pipette, add a few drops of phenolphthalein to it.

\[\ce{2NaOH + H2SO4 -> Na2SO4 + 2H2O}\]

Fill the burette with dil. H₂SO₄ upto zero mark from the burette add dil.H₂SO₄ drop by drop into the flask with constant stirring until pink colour just disappears. Transfer contents of flask to evaporating dish to evaporate water. On cooling crystals of [Na₂SO₄.10 H₂O] are obtained.

\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]