00:02
0 .040 molar barium hydroxide solution at 25 degrees centigrade.
00:07
We have to find the ph of the solution.
00:10
Now, let's see how barium hydroxide dissociates.
00:16
It dissociates and produces barium 2 plus ion and 2 -oh -h -minus ions.
00:24
So one more barium -hydroxide produces 2 -moles of o -h -1.
00:30
Minus ion.
00:31
So, concentration of o .h.
00:34
Minus ion will be twice the concentration of barium hydroxide.
00:41
And concentration of barium hydroxide is given here 0 .040.
00:49
So let's write 0 .040 molar.
00:54
So, so concentration of oh minus ion is 0 .080 molar.
01:03
Now, we know concentration of h plus times concentration of oh minus is equal to kw.
01:13
Kw is the iron product constant of water...