A. Determining the Percent Water and the Formula of a Hydrate Unknown number: Tr

Question

A. Determining the Percent Water and the Formula of a Hydrate Unknown number: Trial 2 is to be carried out if the results of trial 1 are unsatisfactory Trial 1 Trial 2 Mass of crucible + lid + unknown Mass of crucible +lid Mass of unknown hydrate Mass of crucible +lid + residue.. after first heating after second heating after third heating ... Mass of anhydrous salt Mass of water lost Percent water in unknown hydrate Formula of unknown hydrate (from your instructor) Moles of water in the hydrate sample Moles of anhydrous salt in the hydrate sample Complete formula of the hydrate

Explanation / Answer

Firstly Just meaure the crucible+lid+given salt and measure its weight then measure the weight of crucible and lid alone so you get the real weight of the salt given. Then add given soln in the salt it must be a precipitation reaction collect the residue.Heat it in crucible and get to know its weight

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