I am pretty sure the guideline states that any one who try deserve at least a hint.
Recently I posted a problem on chemSE, immediately I got two downvotes, with no one willing to state the reason.
I did describe my steps toward getting my answer, which later appear to be incorrect, which is the whole reason I have asked help. Though not so complete.
How to determine the molar enthalpy of hydration of sodium sulfate in the laboratory?