Copper(II) sulfate is prepared by reacting excess insoluble solid M with solution N. Which row gives the identities of M and N, together with the method used to obtain crystals of copper(II) sulfate from the reaction mixture?
- AM: copper; N: sodium sulfate; method: crystals are filtered out from the mixture
- BM: copper; N: sulfuric acid; method: mixture is filtered and the filtrate evaporated until crystals form
- CM: copper(II) carbonate; N: sulfuric acid; method: mixture is filtered and the filtrate evaporated until crystals form
- DM: copper(II) oxide; N: sulfuric acid; method: mixture is filtered and the residue dried