Question

If the concentration of 250 ml of an aqueous solution of acetone is 20% (v/v), then calculate thevolume of acetone present in it pls answer asap it’s urgent

Answer 1

Given :-

◉ Concentration of 250ml of an aqueous solution of acetone is 20% (v/v)

To Find :-

◉ Concentration of acetone present.

Solution :-

We know, Concentration k% of some element is given by v/v (volume/volume). It indirectly means, k ml of solution of that element is present in 100ml of solution.

Here,

⇒ 20% of acetone means 20 ml of acetone is present in 100 ml of solution.

But, We are given that the volume of solution is 250ml.

We have,

⇒ 100 ml Solution has 20 ml acetone.

∴ 1 ml of solution would 20/100 or 1/5 ml acetone.

Which also means that one fifth of a solution is acetone. No matter, what is the volume of solution given, say if it is given x volume then x/5 would be the volume of acetone.

So,

⇒ Volume of acetone = 250/5

∴ Volume of acetone = 50 ml

Some Information :-

◉ If it is given w/w as k% of some element then k gram of that element is present in 100 gram of solution.

• Mass of solution = 100 - k