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Crystallization of Caustic solution
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Topic: Crystallization of Caustic solution (Read 8596 times)
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stevenjporteous
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Crystallization of Caustic solution
«
on:
November 13, 2008, 11:26:37 AM »
Have searched the internet for information about the crystallization of caustic to no avail. Could someone tell me what temperature sodium hydroxide (caustic) at 3.4% strength would crystalize?
Help please...
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jansenwrasse
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Re: Crystallization of Caustic solution
«
Reply #1 on:
November 14, 2008, 08:16:54 PM »
Are you refering to its new freezing point?
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jansenwrasse
Regular Member
Posts: 15
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Re: Crystallization of Caustic solution
«
Reply #2 on:
November 14, 2008, 09:18:06 PM »
I just realized you were not online
:delta:T
f
= (i)(k
b
)(m)
so you will need to van't Hoff factor(i) for NaOH ( i = 2)
so ...
:delta:T
f
= 2 x 1.86
o
C x .85M = 3.162
o
C
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jansenwrasse
Regular Member
Posts: 15
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Re: Crystallization of Caustic solution
«
Reply #3 on:
November 16, 2008, 09:03:32 AM »
There is an error in my equation I used the molarity for the calculation and the correct form is molality. Converty your 2.3% to molality then the rest is correct. Sorry about that
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Crystallization of Caustic solution