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Topic: NaCl dissolve in water  (Read 5008 times)

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lukxiaofung

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NaCl dissolve in water
« on: October 18, 2004, 10:13:02 AM »
why i still see some crystal of NaCl(salt) in water after i dissolve the salt in water?

Offline AWK

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Re:NaCl dissolve in water
« Reply #1 on: October 18, 2004, 10:50:00 AM »
NaCl dissolves in water rather slowly up to 36 g /100 g of H2O at RT  (~26 % w/w)
and 39 g/100 g H2O at 100 C (~28 % w/w)
AWK

Demotivator

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Re:NaCl dissolve in water
« Reply #2 on: October 18, 2004, 03:50:29 PM »
How do you know you have pure salt? You could have silica filler or impurities unless it's reagent grade.

lukxiaofung

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Re:NaCl dissolve in water
« Reply #3 on: October 19, 2004, 09:17:01 AM »
Actually I am going to get a bigger crystal of NaCl by crystallization,but it is fail. Any things that I did wrong?
First,I dissolved some salt in the water(~RT) until the solution saturated.
Then,I left it somewhere.
Finally,the water evaporated and the salt appeared again.

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