A student titrated Calcium Hydroxide solution with 0.05167M HCl at three different temperatures and collected the following data in

Question

A student titrated Calcium Hydroxide solution with 0.05167M HCl at three different temperatures and collected the following data in lab. Determine the solubility product constant of Ca(OH)2 at each temperature and the standard enthalpy of dissolution(ΔHo dissol) for the process.

Ca(OH)2(s) ↔ Ca2+(aq) +2OH- (aq)

Temp(Deg °C) -23.4

Vol of HCl(ml) -10.85

Answer 1

Ca(OH)₂(s) <==> Ca²⁺(aq) +2OH^-(aq)

Ksp = [Ca²⁺][OH^-]²

Ca(OH)₂(s) + 2HCl(aq) ==> 2CaCl₂(aq) + 2H₂O(l)

To find moles of Ca(OH)2, one needs to know the VOLUME of the calcium hydroxide sample that was titrated with the HCl. This information is not provided. Also, it says that 3 different temperatures were used, but data for only one temp (23.4ºC) is given.

You might want to revisit this question and provide all the information available.