Q.no.12

Q.no.12 'l here is no change in the molarity of S04 ion. There is a change in the molarity of S04.- ion. A current strength of 96.5 A is passed for 10 s through 1 L of a solution of Q. I M aqueouS CuS04. Calculate the pH of the solution. I F of electricity is passed through 10 L Ofa solution of aqueous.solution ofNaC\. - -Calculate-the pwo f the solution. Wbat weight of Ni is plated out in an electrolysis ofaquéous NiS04 solution that is takes place to deposit 2 g of Ag in a silver coulometer that is arranged in series with NiS04 electrolytic cell. [Atomic weight of Ag = 107.8 amu, atomic weight of Ni = 58.7 amul 1. 0.2938 g 2. ANSWER KEY (a) 22.68 g (b) 4.428 L of02, (c) 1

A c c o r d i n g t o F a r a d a y I I l a w, \frac{W e i g h t o f A g}{W e i g h t o f N i} = \frac{E q u i v a l e n t m a s s o f A g}{E q u i v a l e n t m a s s o f N i} [E q u i v a l e n t m a s s = \frac{M o l a r m a s s}{v a l e n c y}] \frac{2}{W e i g h t o f N i} = \frac{107.8 / 1}{58.7 / 2} W e i g h t o f N i = 0.5445 g