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making a solution from a solid

 
 
Reply Thu 22 Jul, 2010 08:45 pm
I want to make a 10% solution of copper sulfate pentahydrate. How much of the crystal copper sulfate do I add to 1 gal. of water? (The crystal is 99% pure)
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Type: Question • Score: 0 • Views: 1,931 • Replies: 1
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tvkyty
 
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Reply Sun 1 Aug, 2010 07:20 am
@Kippster,
first if the crystal is 100%pure

In m (g) CuSO4.5H2O has 16m/25 (g) CuSO4 and 9m/25 (g) water

You add to M (g) water to make a 10% solution : 1/10 = (16m/25 )SadM + 9m/25)

so: m=25M/151

1gal water is 3875 g
m=642 (g)
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