00:02
In this question, given that the value of k .a.
00:09
Of ammonium ion equal to 5 .6 multiplied by 10 raised to power minus 10.
00:25
And the concentration of ammonia minus 0 .45 molar and the concentration of ammonia minus 0 .25 molar.
00:38
And the concentration of ammonia is given as 0 .25 molar.
00:46
We have to calculate the value of ph of the solution.
00:56
Now, coming on to the solution, so here the formula to calculate kb is equal to kw divided by ka.
01:18
So we put the values here that will be 1 .0 multiplied by 10 raised to power minus 14 divided by 5 .6 multiplied by 10 raised to power minus 10.
01:30
So, the answer will be 1 .7860 multiplied by 10 raised to power minus 5.
01:40
So, this is the value of kb.
01:44
Now, we have been provided with the concentrations.
01:49
So, ammonium ion concentration, this is a salt.
01:55
So we can write 0 .45 molar and the concentration of the concentration of the amount of the amount of the salt.
02:01
Ammonia...