December 13, 2019, 07:39:47 AM
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Topic: Calorimetry Laab  (Read 188 times)

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Offline v___io

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Calorimetry Laab
« on: November 24, 2019, 08:48:44 PM »
I have this chemistry lab where we perform a reaction between calcium and water to form calcium hydroxide and H2 in a calorimeter. After the lab, we are given the equations of formation and asked to do hess' law and find out the heat of reaction for calcium hydroxide. I am already done this part, but the last part is that is that i have to use the solubility of Ca(OH) (<0.1 mol/L) and then use that to show how much of an impact that has on the final experimental value for the heat of formation of calcium hydroxide. How do I use the solubilty to do that?

Offline Borek

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Re: Calorimetry Laab
« Reply #1 on: November 25, 2019, 03:45:42 AM »
Can't say it is entirely clear to me what you are expected to do.

My best guess is that as the heat of formation is for a solid Ca(OH)2 you need to take into account dissolution heat.
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