A chemist mixed some 20% peroxide sol with some 30% peroxide sol to make 500ml of a 25% peroxide solution.How many ml of each solution should be used? HELP just cannot get this one..

Question

A chemist mixed some 20% peroxide sol with some 30% peroxide sol to make 500ml of a 25% peroxide solution.How many ml of each solution should be used?  HELP just cannot get this one..

Reiny · Answer

wouldn't you have something like .20(x) + .30(500-x) = .25(500) ?

S.G · Answer

Thanks, will try working that again.