Question

1
The quantry of water (in ml) needed to reduce 9ml
Saving lotion containing 50% alcohol to a lotion
Containing 30% alcohol is​

Answer 1

Answer:

50% of 9ml =30% of xml

50/100*9=30/100*x

x=15

since it is reduced by 9ml we have,

15ml-9ml=6ml

OR

alcohol = 9*50/100 = 4.5 ml

30*x/100 = 4.5 ...... x = total amount of solution for which 4.5 ml forms 30% conc.

x = 15ml

thus water to be added = 15-9 = 6ml