Starting with 50 cm cubic of 2.8molar NaOH describe how a sample of pure sodium sulphate can be prepared

Answer 1

Sodium sulfate can be prepared by the neutralization of sulfuric acid (H2SO4) with sodium hydroxide (NaOH). To prepare a sample of pure sodium sulfate, you would first need to neutralize 50 cm^3 of 2.8 M NaOH with an equivalent amount of sulfuric acid. This would involve carefully measuring out a specific volume of sulfuric acid (equal to the volume of NaOH used) and slowly adding it to the solution of NaOH while stirring, until the reaction is complete. The resulting solution would contain dissolved sodium sulfate, which can be separated out by allowing the solution to cool and crystallize. The crystals can then be filtered off, washed, and dried to obtain a sample of pure sodium sulfate.