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the solubility of MnSO4 is 62.9 gms/100 gms of water @ 20 C. so the solubility of MnSO4 . 5H2O will differ from that of the first case or not & what should be the citeria for the solubility of that component

[JEBradley]

Unfortunately the degree of hydration does affect the solubility of the species. Infact it is possible for an anhydrous compound to be insoluble while the hydrate readily soluble.

Also in degrees of g dissolved / 100g water. The solubility will change because the molecular mass has changed. (this is by-the-by as the fundamental solubility has changed anyway).

I think you will find it difficult to move on with your problem - thinking of the solubility data I've seen, I cant remember it breaking compounds down into their various hydrates. All I can suggest is a search through the back catalogues of online journals and see if you can buy an article that is relevant. - Or you could measure it yourself but then you have to isolate the compound which I guess would mean some spectographic equipment - if its available to you then go for it.