00:01
Hi, there is a question we say that how many ml of 3 % acetic acid must be mixed with 15 % acetic acid to give 2500 ml of 10 % acetic acid.
00:15
So 3 % acetic acid, 15 % acetic acid mixed with to give 10 % acetic acid and 2500 ml.
00:29
Let us say x, so this will be 2500 minus x ml ml.
00:36
So equating the quantities of acetic acid 3 % of x from here and 5 % of 2500 minus x equal to 10 % of 2500 ml.
00:52
X by x into 3 by 100 plus 5 into 2500 minus x by 100 equal to 10 into 2500 by 100.
01:11
It's cancelled out 3x plus 12500 minus 5x equal to 2500 minus 2x equal to 12500.
01:32
Okay, one thing i had missed that this is 15%.
01:39
That means i need to write 15%, 15%, 15 by 100.
01:47
So the calculation will be a 25 ,000 minus 15x equal to 2500 and 0.
02:08
So minus 12x will be 25 ,000 minus 15 into 2500.
02:19
So x will be 5000.
02:27
Okay, not 5000.
02:29
It will be 15 into 2500 minus 25 ,000, 12 ,500 divided by minus 12, 104, 1 .7 ml...