2.39: Describe an Experiment to Prepare a Pure, Dry Sample of a Soluble Salt, Starting from an Insoluble Reactant

PREPARATION OF A SOLUBLE SALTS:

s

USING DILUTE ACID AND INSOLUBLE BASE:

s

PREPARATION OF SOLUBLE SALTS - METHOD 1

Diagram showing the Filtration of Mixture to Remove Excess Base

METHOD: Add dilute Acid into a beaker and heat using a bunsen burner flame Add the insoluble base in small amounts and stir until base is in excess (base stops disappearing and a suspension of base forms in acid) Filter mixture into an evaporating basin to remove the excess base Leave the filtrate in a warm place to dry and crystallize Decant excess solution Blot crystals dry