How to obtain ferrous sulphate from impure sample of ferrous?
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Preparation of the solution
Take about 25-30 ml of distilled water in a beaker and add powdered crude copper sulphate while stirring the solution so that the powder dissolves.Keep adding the powdered sample till a little of it remains undissolved, even if it is stirred thoroughly.Now add 2-3 ml of dil. H2SO4 to make the solution clear. This prevents the hydrolysis of copper sulphate.
Filtration of the solution
Take a funnel and fix a filter paper in it and clamp it to a stand.Place a china dish under the funnel. The stem of the funnel should touch the wall of the china dish to avoid the solution splashing out.Pour the solution into the funnel over a glass rod and collect the filtrate in a china dish. The insoluble impurities are left in the filter paper as residue.
Take about 25-30 ml of distilled water in a beaker and add powdered crude copper sulphate while stirring the solution so that the powder dissolves.Keep adding the powdered sample till a little of it remains undissolved, even if it is stirred thoroughly.Now add 2-3 ml of dil. H2SO4 to make the solution clear. This prevents the hydrolysis of copper sulphate.
Filtration of the solution
Take a funnel and fix a filter paper in it and clamp it to a stand.Place a china dish under the funnel. The stem of the funnel should touch the wall of the china dish to avoid the solution splashing out.Pour the solution into the funnel over a glass rod and collect the filtrate in a china dish. The insoluble impurities are left in the filter paper as residue.
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