Question

ID03/2 hul the lune strength is due solely to the O 0.562 7.5 x 10-3 O 5.2 x 10-3 4.2 x 10-3 4. Magnesium fluoride (MgF2) is a sparingly soluble salt. It has Kp = 7.4x10-9. Calculate the concentration of fluoride ion in a saturated solution of MgF,. O 1.2 x 10-3 M O 2.5 x 10-3 O 7.4 x 10-9 O 6.3 x 10-5 5. Consider the reaction Sr(s) + FeOH(aq) + H2O + (aq) Sr2+ (aq) + Fe(s) + 2 H2O(l). Which of the following will result in a decrease in Sr+ concentration? O Adding excess Fe(s). Adding HNO3 Adding KOH. None of the above.

Answer 1

adding of excess of solid Fe does not affect the equilibrium constant

PACENO DATE: - Mg 1) - My Tag) + Of Cae) - s as 1 si sclubility in M Kse z Ing. ) - 3:4x17" = (39(2012 7:4X100 = 453 50 = 74X15314 S= (185X160) Sa 0.0012276 [F-)=25 = 2(0.0012276) ... 0-00245 M = 2.45 x 10-3M m25X103M 1 5) | Adding Kon On adding kori , it will remove Hot which is reaction - Acc. to Le-Chatler pinaple when reactant is removed, the equilibrium shift. o reaction towards reactants te reaction to ha so Sght decreases go backward and