Question

CHEM 2A Class Pack F18 4. Predict which way the equilibrium will shift for each of the following changes: Mg(OH)2 (s) + Mg2+ (aq) + 20H" (aq) I. increase [Mg] ii. increase (OH) ii. add KOH iv. add solid Mg(OH)2 v. decrease [Mg] vi. decrease pH vii. add MgCl2 viii. add catalyst ix 4b. Which of the changes above decreases the production of hydroxide ions? 5. Which of the following will increase the amount of calcium phosphate? Cas(PO4)2 (s) + 3 Ca?* (aq) + 2 PO. (aq) (4) a) Add more calcium chloride b) Remove some phosphate ions c) Add a catalyst d) Increase the pressure

Answer 1

liven beach Mg(OH)2(3) < Mg 24/eq) + 204 tag) 4) I Increase t Mg 2+] - Equilibrium slift hackeoandie Product to reactand sicle so that increased comen can be reduced. IT) Increase [on] - Eglilibn'um eleift kockewed me Pin brief to recoctent side to that hereased Conch can be reduced "III) Addling KOH -Equilibrium süff leackesend des to it increases Lenn] 10 et leackward - faveun It Add Salid Mg (OH), bouilibrium shift forward direction e ecoctant to product Siche lo that increased concentration con los endered I decrease [Mg 2+] - Equilibrium shift in forwand. O direction so that reduced conch can be increased I decrease pH → Equilibrium shift in backweb forwand direction ie Reactant to proceed. decreaninph increase Htion and so 1. decrease in [OH-] hor VI Add Mgel, Equilibrium shift in packwords direction- Ал кі, і стелі -ка Ca 2+] олооч sluft from foro duet to secectant Vil Add Catelyst - No change dus

ubi which changes decscause the forecluction of or] 1. Incisease [Mg2] 2i increan [our] 3.) Add solid Mg(OH)₂ 4). Add Miche wiven scach Ca (Poy); (51 2 360 2+ (aq) + 2 Po, 3loq) To increase the amound of collum phosphate means reach should be backward a) Aeld more calcium chloride b) Increase the fressene on ↑ pressure the Equilibrium shift towards the fewer mole side