00:01
In the given question, you are supposed to calculate the acid dissociation constant a and pcaa value for salicylic acid.
00:07
Let us consider the dissociation of salicylic acid, h .o.
00:11
C6, h4, c -o -o -h, 1 mole of cellicidic acid dissociates to give one more of conjugate base, that is, o minus, c6, h -4, c -o -o -1, plus 2 moles of h -p -eons.
00:31
Hence dissociation of 1 mole of cellic acid results in the formation of 1 mole of the corresponding conjugate base and 2 moles of proton.
00:39
The acid dissociation constant expression for cellic acid can be given by concentration of the corresponding conjugate base and the concentration of h plus ion rise to the power 2 divided by the concentration of cellic acid itself c6 h4 c0.
01:02
Ph ph value of the solution is given as 1 .93 and the hydrogen ion concentration can be calculated from the ph value where concentration of hutch plus ion is given by anti -log of ph itself hence by taking anti -log for ph 1 .93 we get hydrogen ion concentration as 0 .01174 molar from the above expression we got to know that the concentration of the corresponding conjugate base formed from the dissociation of cellic acid is half the concentration of h plus ion produced hence the concentration of cb is conjugate base is 0 .01174 divided by 2 which is equal to 5 .87 into 10 to the power minus 3 molar the concentration of conjugate base is considered as x now let us construct the ic table to find the equilibrium concentration of heat substrate, that is salicylic acid, the corresponding conjugate base and h plus ion.
02:24
The initial concentration of cellic acid has given the question is 1 .0 .126 molar.
02:31
And the initial concentration of conjugate base is 0 and hydrogen is 0...