Posted by Johny on Tuesday, February 19, 2013 at 1:42pm.
mass of crucible 26.4574g
mass of crucible and hydrated sample 27.7617g
mass of hydrated sample 1.3043g
mass of crucible and dehydrated sample 27.5693g
mass of dehydrated sample 1.1119g
mass of filter paper 0.7089g
mass of filter paper and copper 1.1418g
mass of copper ?
no. moles of copper ?
mass of water evolved ?
no. moles of water ?
mass of chlorine in sample (by difference) ?
no. moles of chlorine ?
mole ratio, chlorine:copper in sample ?
mole ratio, water:copper in hydrated sample ?
formula of dehydrated sample (round to nearest integer ?
formula of hydrated sample ?

chemistry  DrBob222, Tuesday, February 19, 2013 at 2:11pm
I filled in the empty spots I could but didn't finish. I understand that the chlorine is by difference but I don't know what you did; therefore, I don't know where the chlorine came from.
mass of crucible 26.4574g
mass of crucible and hydrated sample 27.7617g
mass of hydrated sample 1.3043g
mass of crucible and dehydrated sample 27.5693g
mass of dehydrated sample 1.1119g
mass of filter paper 0.7089g
mass of filter paper and copper 1.1418g
mass of copper 1.14180.7089 = 0.4329</b
no. moles of copper grams/atomic mass = 0.4329/63.54 = about 0.007 but you can do it more accurately.
mass of water evolved 1.30431.1119 = 0.1924
no. moles of water g/molar mass = 0.1924/18 = about 0.01againyou redo this
mass of chlorine in sample (by difference) ?
no. moles of chlorine ?
mole ratio, chlorine:copper in sample ?
mole ratio, water:copper in hydrated sample ?
formula of dehydrated sample (round to nearest integer ?
formula of hydrated sample ?
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