Answer to Question #155251 in General Chemistry for Kei

Question

A saturated solution of Magnesium hydroxide was prepared by dissolving solid Mg(OH)2 in distilled water. 25.00 mL of the saturated solution was titrated using 0.00100M HCl as a titrant and bromocresol purple as an indicator in a laboratory at 19.0 celsius. A volume of 12.36 mL of the acid was required for the neutralization reaction Mg(OH)2 (aq) + 2HCl (aq) ==> MgCl2 (aq) = 2H2O (l)

i) what is the molar solubilty of Mg(OH)2

ii) the concentration fi Mg^2+ and OH- ions in the saturated solution

iii) The ksp of Mg(OH)2

Answer 1

I) 0.0002472mol/l

II) 0.0002472M and 0.0004944M

III) 6.04*10^-11