Question

Question 1 O out of 5 points Would the calculated equilibrium constant be too high or too low if some solid calcium hydroxide leaked through the filter paper? Selected Answer: Answers: Too low Too high Too low No effect Question 2 O out of 5 points In titrating the Ca(OH)2 filtrate. A student consistently went past the end point by about 2.0 ml every time. Will the measured Ksp be too big or too small? Too big because the moles of OH" are underestimated. Answers: Too big because the moles of OH are overestimated. Too big because the moles of OH are underestimated. Too small because the moles of OH are overestimated. Too small because the moles of OH are underestimated

Answer 1

Would the calculated equilibrium constant be too high or too low if some solid Calcium hydroxide leaked through the filter paper?

ans) No effect

Explanation :

While Calculating Equilibrium Constants, Pure Solids and liquids will not change the equilibrium. So that they are not involved in the equilibrium constant expressions. Because Pure Solids and liquids does not alter the reactant amount at equilibrium in the reaction. As a result, they are omitted, and the activity value 'a' in a reaction for pure solids and liquids will be 1.

Will the measured Ksp will be too big or too small

Too Small because the moles of OH^- are underestimated.

Explanation:

Basically Calcium Hydroxide is relatively soluble. After the endpoint shows excess of Calcium hydroxide. When more amount of Calcium hyroxide is added, Ksp value will get decreased. If the Substance has more Ksp value, the solubility will also more ie., it has more dissolved ions. Since it has less Ksp value the dissolved ions will also be lesser.