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I bought a chemistry set for my sons last weekend and the instructions stated that, to do all the experiments, more copper sulphate and aluminium potassium sulphate (APS) would have to be purchased. The copper sulphate is not a problem, but the APS appears to be available in two forms: APS 12-WATER LR and APS 24-water LR. The APS in the chemistry set is 24-water (LR is not mentioned), but the type available from a UK supplier is 12-WATER LR. Would the 12-WATER LR be okay?Also, can anyone suggest a chemical supplier that sells small quantities of chemicals? The smallest weight I've found so far is 500g.Thanks.
Whether or not they involve exact amounts they are the sameKAl(SO4)2 .12 H2O is the same as K2SO4Al2(SO4)3 24H2O
It depends on whether you look at it as derived from the two separate salts K2SO4 and Al2(SO4)3stuck together with 24 molecules of water or as a compound in its own right.