Measure 40 cm3 sulfuric acid into the 100 cm3 beaker., The volume does not need to be very accurate, so you can use the graduations on the beaker., Set up the tripod, gauze and heatproof mat. Heat the acid gently using the Bunsen burner until it is almost boiling. Turn off the Bunsen burner., Use the spatula to add small amounts of copper (II) oxide powder. Stir with the glass rod., Continue to add copper (II) oxide if it keeps disappearing when stirred. When the copper (II) oxide dissolves the solution is clear blue., Stop adding the copper (II) oxide when some of it remains after stirring. Allow apparatus to cool completely, Set up the filter funnel and paper over the conical flask. Use the clamp stand to hold the funnel., Filter the contents of the beaker from the earlier step., When filtration is complete, pour the contents of the conical flask into the evaporating basin., Evaporate this gently using a water bath (250 cm3 beaker with boiling water) on the tripod and gauze. Stop heating once crystals start to form., Transfer the remaining solution to the crystallising dish. Leave this in a cool place for at least 24 hours..

making copper sulfate practical

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