00:02
Here in this problem, given ph of a solution is 5 .15, we have to find out the oh minus ion concentration.
00:12
And the second problem, a neutral solution of water at a particular temperature has a concentration of oh minus 7 .9 times 10 to the power negative 7 molar.
00:24
And we have to find the kw at this temperature.
00:28
Now, first one, ph is 5 .15.
00:32
Will find out poh.
00:34
We know ph plus poh of a solution is 14.
00:40
So poh will be 14 minus ph.
00:46
And here it will be 14 minus ph is 5 .15.
00:52
That will be 8 .85.
00:56
That's the poh.
00:58
Now we have to find out which minus iron concentration.
01:02
What is? p .o .h.
01:04
Negative log o .h...