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- **1.1418-0.7089 = 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- ** 1.3043-1.1119 = 0.1924**

no. moles of water- ** g/molar mass = 0.1924/18 = about 0.01--again--you 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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