00:03
Here in this problem given, ph of a weak base of 0 .10 molar is 9 .82.
00:13
We have to find the kb of the base.
00:16
Now, ph given 9 .82.
00:23
Now we know ph plus poh is 14.
00:27
So, poh for this base will be 14 minus ph.
00:35
That is 14 minus ph is 9 .82.
00:40
So, poh of this weak base is 4 .18.
00:47
Now, we can find out the concentration of o .h minus.
00:52
P .o .h is negative log, oh h minus ion concentration, that is 4 .18.
01:00
So we can write log oh -h minus ion concentration is negative 4 .18.
01:07
So, concentration of oh -h -miss minus is 10 to the power negative 4 .18...