This blog will cover and explain the specification for Edexcel triple science course 2013 Chemistry. Hope it helps :)
Not sure if you need to know the method but here it is for anyone who wants to knowMix two solutions togetherFilter the mixtureWash with distilled waterthen set aside to dry and crystallize
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A precipitate reaction simply involves you mixing 2 solutions together one of the solutions contains the positive ions you want in the salt and the other solution contains the negative ions you want in the salt