i read that to bleach hair we should use 3 percent hydrogen peroxide. the bottle i got is 100ml and says 6% w/v h2o2.so how much percentage of peroxide does it contain. how should i dilute it
closed as off-topic by orthocresol♦, ron, Todd Minehardt, M.A.R., Jan Jul 3 '16 at 16:39
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If you mix equal masses of 6% hydrogenperoxide and water you will get 3% hydrogenperoxide.
Since the density of both liquids is rougly the same you can also mix equal volumes.