a certain brand of laundry aid called "Oxydoodle" is 12.5% (w/w) sodium percarbonate and 87.5% (w/w) sodium carbonate. Calculate the % (w/w) h2o2 in Oxydoodle

Question

a certain brand of laundry aid called "Oxydoodle" is 12.5% (w/w) sodium percarbonate and 87.5% (w/w) sodium carbonate. Calculate the % (w/w) h2o2 in Oxydoodle

Answer 1

I assume this dry compound is

12.5 g Na2CO3*1.5H2O2/[(12.5 g Na2CO3*1.5H2O2)+(87.5 g Na2CO3)]

So the real question is, how much H2O2 is in the 12.5 g. That will be
12.5 x (1.5 x molarmass H2O2)/(molarmass Na2CO3*1.5 H2O2)