# what is the equation i should use to dilute 50% hydrogen peroxide into lower concentrations?

hello, i just got some 50% hydrogen peroxide, from my local pharmacy because they were out of 35%, plus for some reason 50% is free.

anyways, i want to know whats the equation for finding out how many ml's of water i need to use to dilute a solution toa certain amount, as i want to use the 50% peroxide to make 30% , 22% and 3% peroxide.

now ive looked on google and i couldnt find a thing , and if i did by chance come across it, i didnt understand it.

what i want to know is how much distilled water will it take to convert 100ml of 50% hydrogen peroxide to the above concentrations, or if possible, could someone please give me the equation for converting any concentraion to any, please!

also, whoever answers my question and solved my problem entirely will get a best answr i promise!!!

anyways, i want to know whats the equation for finding out how many ml's of water i need to use to dilute a solution toa certain amount, as i want to use the 50% peroxide to make 30% , 22% and 3% peroxide.

now ive looked on google and i couldnt find a thing , and if i did by chance come across it, i didnt understand it.

what i want to know is how much distilled water will it take to convert 100ml of 50% hydrogen peroxide to the above concentrations, or if possible, could someone please give me the equation for converting any concentraion to any, please!

also, whoever answers my question and solved my problem entirely will get a best answr i promise!!!

active| newest | oldestThe concentration is a direct ratio. If it is indeed 50% then you need to figure out how much peroxide there is in a given amount of concentrate (divide by 2) and then figure out how to make a different %.

100mL of H2O2 has 50mL of the magic juice.

If you want 3%, you need to add water inversely (cross multiply)

50ml (hydrogen peroxide)/(100ml + added water) = percentage of hydrogen peroxide

Water to add (ml) = (50/Required percentage) - 100

So 30% you add... 66.6ml = (50/0.3)-100

For 22% you add... 127.3ml = (50/0.25) -100

for 3% you add... 1566ml = (50/0.03) - 100

as in if i were to use 10ml, proportionally it should be the same, right?

But if you want...

Water to add (ml) = (ml of hydrogen peroxide)/Required percentage) - (ml of total liquid)

so for 10ml...

For 30% you add... 6.6ml = (5/0.3) - 10

For 22% you add... 12.7ml = (5/0.25) - 10

for 3% you add... 156.6ml = (5/0.03) - 10

my question

" I have 50% h2o2 and make 10,20 ,30 % H2o2 plz send immediately,I hope positive response urgently