00:02
Hello students, hope you are doing great.
00:04
In this question we are given the values of ph or any of the and we have to find out the missing values.
00:10
So for the first column we can see that ph is given and poh is given and we have to fill up the rest of the columns.
00:16
So let us see the formulas first.
00:18
Here in the first part we are given ph is equals to 4.
00:23
We know that formula ph is equals to minus log of h plus iron.
00:28
So concentration of h plus iron is equals to 10 raised to the power minus 4.
00:33
So we will put 10 raised to the power 4 in the column under h plus iron concentration.
00:39
Next we are given poh is equals to 10.
00:42
So we will find out concentration of poh is equals to, first we need to understand that poh is equals to minus log of oh minus iron.
00:54
So concentration of oh minus is 10 raised to the power minus 10.
00:58
Here we can also see that the ph is less than 7.
01:02
Therefore it is acidic and next we have to find out kw that is the h plus into oh minus.
01:16
This is equals to 10 raised to the power minus 4 into 10 raised to the power minus 10.
01:22
So kw here is equals to 10 raised to the power minus 14.
01:29
Pkw is equals to ph plus poh.
01:35
This is equals to 4 into 10.
01:40
So pkw is equals to 14.
01:43
Now we will put the values into the equation, into the table.
01:48
So here we have h plus iron concentration is equals to 10 raised to the power minus 4.
01:52
Oh minus is 10 raised to the power minus 10.
01:55
This is acidic.
01:56
Kw value is 10 raised to the power minus 14 and pkw is equals to 14.
02:03
Now for oh minus concentration given as 0 .01, the poh value is 2.
02:08
14 minus 2 is 12.
02:10
So ph value is 12 and this is 10 raised to the power minus 12.
02:17
Since ph is greater than 7, so this is basic solution.
02:22
Now h plus iron concentration is given as 0 .1.
02:25
So using the formula we have ph is equals to 1, poh is 13 and this is 10 raised to the power minus 13...