7. The pH of ammonium phosphate solution, if pk of phosphoric acid and pk of ammonium hydroxide are 5.23 and 4.75 respectively, is ..... The number of stereoisomers possible for [Co(ox), (Br) (NH)].......... 8. [ox = oxalate] 9. Emf of the following cell at 298 K in V is x x 102. Zn Zn (0.1M)||Ag (0.01M) Ag The value of x is..............(Rounded off to the nearest integer) Zn/Zn Given: E =-0.76V; E =+0.80V; Ag/Ag 2.303RT F -= 0.059 10. The NaNO3 weighed out to make 50 mL of an aqueous solution containing 70.0mg Na* per mL ................ (Rounded off to the nearest integer) [Given; Atomic weight in g mol -Na: 23; N: 14; 0:16]