Question

how much water should be added to 25 ml of alcohol to make its concentration 50%

Answer 1

50 ml of water is added to 25 ml of alcohol to make its concentration of alcohol of 50 % concentration

Answer 2

Answer-

25ml

Explanation:

vol. of solute = 25 ml(alcohol)

Conc. = 50%

conc. = vol. of salute / vol. of solution *100

vol. of water = vol. of solution - vol. of solute

50% = 25/x * 100

x= 2500/50

x=50ml

vol. of water = 50ml-25ml

= 25 ml.

i hope you understood