a) A student A weighed .50 Ca(OH)2 for his saturated solutionand student B weighed 0.23 g, Both students dissolved it in 60 mlof water and both had solid left in their solution beforefiltrating. After filtrating to a clear solution, which student hadthe most concentrated solution? What would the effect on the volumeof HCl titrant used and the calculated Ksp of the reaction if oneof the students had a couldy solution after filtering and proceededto titrate it compared to a clear solution?
(b) A saturated solution of CA(OH)2 is prepared and filtered. If9.32 mL of 0.045 M HCl is used to titrate a 10 ml sample of thesolution to end point:
- how many moles of Ca^2+, OH- were in the original 10 mLsample
- what are the concentrations of Ca^2+ and OH- in the saturatedsolution?
- what is the molar solubility for Ca(OH)2 under theseconditions?
- Calculate Ksp for Ca(OH)2 under these conditions
(c) If change in entropy of the universe can tell us whether aprocess will be spontaneous, why do we need delta G (Gibb's freeenergy)
