00:03
Here in this problem, given a buffer contains 0 .220 mole of acno and 0 .410 mole of nacno in 2 .0 litre solution.
00:16
Ka4 acno, that is philmanic acid, is given here.
00:21
We have to find the ph of the buffer.
00:23
First, we'll find out the molar concentration of acno and nacno.
00:28
Now, the concentration of hcno, that will be number of moles of hcno, that is 0 .220 mole, divided by litre of solution, which is 2 .0 liter, and that is 0 .110 moles per liter.
00:49
That is 110 molar.
00:51
Now we'll find out the molar concentration of nacno and that will be moles of nacno that is 0 .410 mole divided by volume of solution.
01:08
This 2 .0 liter and that is 0 .205 mole per liter that is molar.
01:17
Now, we'll use henderson -hasselbach equation to find the ph of the buffer...