Asked by Lenece

14.1g of hydrated zinc sulphate was heated. 0.52moles of water was driven off. What is the hydrate formula?
Answered by bobpursley
What is the mass of .52 moles of water. Subtract that from 14.1g . How many moles of zinc sulphate is that.
Now you know how many moles of water you have to xxxx moles of zinc sulfate, what is the ratio? That is the coefficent of the water.
Answered by Lenece
the mass of 0.52 moles of water is 9.3g...so that would be..9.3-0.52=8.78.I don't get it after that
Answered by Lenece
4.8 sorry ...
Answered by bobpursley
ok, how many moles of zinc sulfate is 4.8 grams.

Then divide that number of moles of zinc sulfate INTO the moles of water, that give you the coefficent of the water in the hydrated molecule.
Answered by Lenece
14.1g ZnSO4.xH2O
after heating mass formed is 4.4g or 0.03mole
after heating mass driven off is 9.3g or 0.52 mole

you said take the mass of 0.52 mole of water(9.3g) and subtract it from 14.1g that will give 4.8g....

after that im lost

Answered by Lenece
is the answer 17..
Answered by bobpursley
yes, according to your data. I suspect something was not right with it.
Answered by Lenece
thank u..i will definitely come back on this site!!!
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