Question

13. A solution has an [H] =0.000132 M. The pH of the solution is A) 3.9 B) 6.3 C) 2.7 D) 10.1 Page 3 14. A solution has a pOH of 5.8. The pH is A) 5.8 B) 2.8 C) 8.2 D) 0.76 15. An electrochemical process has a standard-state cell potential, Eºcell = +0.185 V. If the electron stoichiometry is 2, what is 4Gº in kJ/mol? A) 0.37 B) 17.8 COD) 35.7 E) Not enough information to solve 16. Adding product to a reaction at equilibrium will cause the reaction to A) make more product B) terminate C) make more reactant D) freeze

Answer 1

The Here [HI] (13) A solution has an [ht] = 0.000132 M. PH of the solution es Ans: A. 3.9 soln (H +3 = 0.000132M=1.32x104m се know PH = -log [1.32.8104] - [ log (1:32) - uloglo = -log (1:32) + 4 = -0.120 +4 3.88 ~ 3.9 (14) A solution has a pot of 5.8. The pitis- log (ht] Ansi-(c) 8.2 soll, fore any solution pko pot = 5.8 pH t pot ly pH=14-5.8 11 8.2.

(15) An electreochemical preocess has a standard state cell potential, Ecell = +0.1858. If the is a, what is an in electron stocheometrey ksimal ? ang: -35.7 kg solo, Herce Ecell = to 185 v n- electroan stochiometry = 2 f 96,500C we know Ab=noft (16) =-2X 96500X0.185 =-35,700 J =-35.7KS reaction at will cause the reaction to Ans:-(C) Make more reactant Adding preoduct to a equilibrium Sath soln Accore ireding to lechateliere's proncople, adding additional reactant to a system will shift the equilbroum to the right towards the side of the preoduct. If we add additional preoduct to a system, the equilibrium will shifts to the left oecderi to produce more reactant. Increase in conc. of shifts the any of the preoducts equiebrium direction ( Produce morch Backward reactant