Naked Science Forum

Non Life Sciences => Chemistry => Topic started by: cyentist on 26/07/2004 15:53:53

Title: How much nitrate would be needed to alter the freezing point of water?
Post by: cyentist on 26/07/2004 15:53:53

Could someone please help me answer these two questions?
1.  To change the freezing point of water from 32 degrees F to 31 degrees F, how many PPM of nitrates need to be added?
2.  If the normal freezing point of water is 32 degrees F, with 15, 30, and 60 PPM of nitrates added, what would that change in temperature be?
Please don't think that by answering these questions, you're doing my homework for me.  I'm 1 year out of college and this is for general knowledge.  Thanks so much!

Title: How much nitrate would be needed to alter the freezing point of water?
Post by: chris on 15/07/2008 10:07:02

Is there actually a formula to calculate how melting and freezing points change with the addition of different salts?

Title: How much nitrate would be needed to alter the freezing point of water?
Post by: Bored chemist on 15/07/2008 20:54:58

Yes,
The information is here.
http://en.wikipedia.org/wiki/Freezing_point_depression

Title: How much nitrate would be needed to alter the freezing point of water?
Post by: chris on 16/07/2008 00:17:31

Thanks BC, really useful link.

C