[v___io]

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?

[Borek]

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.