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प्रश्न
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.
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उत्तर १
The name of the procedure used to prepare a sodium salt such as sodium sulphate is Neutralization of acid with base.
उत्तर २
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.
\[\ce{Na2SO4 + 10H2O -> Na2SO4.10H2O}\]
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