Question

How do you work this problem? You have 5 ml of a 75% solution. You dilute the solution to 50 ml. what is the new percent strength of the diluted solution?

Answer 1

We can use formula

Q1 x C1 = Q2 x C2

where Q is quantitiy and C is concentration

Now,

Q1 = 5

C1 = 75

Q2 = 50

C2 = ?

So using above formula

5 x 75 = 50 x C2

C2 = 375/50

C2 = 7.5%

and the volume is increased 10 times, so the strength is decreases by 10 times.

So answer is 7.5%