00:01
Hello students welcome here in this question we have given we have to calculate the grams how many grams of boric acid so boric acid is used in compounding the following prescription so what is the prescription so here the area is phenostin phenastrin is hydrochloric hcl is given as one and boric acid we had to find out so this one is we had to find out and purified water is taken water is 60 ml is taken and we have to make the isotonic solution for this one and e value for this one is given that so e value equivalent value of finast lane is given that phenacetylene hydroglorel.
01:15
Okay, it is 0 .20 and e value for boric acid is given that boric acid is given that 0 .52.
01:29
Okay, so now we will calculate the boric acid amount of boric acid required to produce the given prescription.
01:39
So first of all, we will see what happens.
01:42
So these are the given data.
01:46
So first step is taken that in shelling.
01:50
What happens? the amount of nacl to make.
01:54
So nacl to make 60 ml of an isotonic solution.
02:05
Solution.
02:06
Consist contribution hydrochloric acid contribution to the value of nacl equivalent.
02:17
So nacl equivalent we will see here 60 ml and 1 % of hcl, this one, this one, finastalin acetalin is present.
02:26
So 1 % 1 gram divided by 100m.
02:30
So that is equal to 0 .6 grams.
02:33
So equivalent weight is given here.
02:36
So equivalent value is given.
02:38
That's why we will multiply this one, 6 multiplied by 0 .20.
02:45
Then we will get 0 .0 .12 grams of finastylene is present here.
02:52
Second one...