# The flask contained 140 g of a 10% solution of potassium permanganate. 60 g of a 30% solution of potassium permanganate

**The flask contained 140 g of a 10% solution of potassium permanganate. 60 g of a 30% solution of potassium permanganate was added to it. Determine the percentage of potassium permanganate in the resulting solution.**

1) We find out what mass of potassium permanganate is contained in a 10% solution, if the entire mass of the solution is 140 grams.

140 – 100%

X – 10%;

X = 140 * 10/100;

X = 14 grams.

2) Find out the mass of potassium permanganate in a 30% solution.

60 – 100%

x – 30%;

X = 60 * 30/100;

X = 18 grams.

3) Find out the new mass of the resulting solution.

140 + 60 = 200 grams.

4) Find out the mass of potassium permanganate in a new solution.

18 + 14 = 32 grams.

5) Find out what is the concentration of the new solution.

200 – 100%

32 – X%;

32 * 100/200 = 16%.

Answer: the new solution contains 16% potassium permanganate.