MadSci Network: Chemistry
Query:

Subject: Why does calcium chloride become warm when added to water?

Date: Mon Oct 2 09:05:00 2000
Posted by Cindy
Grade level: 4-6 School: Grandview School
City: Catskill State/Province: NY Country: USA
Area of science: Chemistry
ID: 970491900.Ch
Message:

We did a science activity in class involving a solution of calcium 
chloride and a solution of magnesium sulfate.  When the calcium chloride 
was added to the water and mixed around the test tube got warm. The 
Magnesium sulfate didn't.  I thought heat was only produced by a chemical 
reaction.  What chemical reaction is going on when calcium chloride is 
added to water? Does something different happen to the calcium chloride 
than to the magnesium sulfate?


Re: Why does calcium chloride become warm when added to water?

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