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Q & A: volume change when salt dissolves

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Most recent answer: 11/25/2014
Q:
http://www.eng-tips.com/viewthread.cfm?qid=217331 This is accurate, about the volume of water decreasing?
- Adam Hansen (age 13)
Macungie, PA US
A:

When ordinary NaCl salt is dissolved in water, the solution has more volume than the water had but less than the combined volumes of the water  and the salt. There are some other salts for which the volume of the solution is even less than that of the water itself. We mention some (e.g MgSO4) in this old answer:
 .

There are a lot of answers on that site you give, and some of them seem accurate.

Mike W.


(published on 11/25/2014)

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