(21) Calculate the strength of 5 volume of H202.
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2H2O2 ----> H2O + O2
68 g. 18g. 32g(22.4 L at STP)
5 Volume H2O2 means 1 L of H2O2 solution will release 5 L O2.
22.4 L O2 is released from 68 g H2O2
:. 5 L O2 is released from..
mH2O2 = 68×5/22.4 = 15.18 g
:. Strength of H2O2 in 5 volume solution = 15.18g g/L = 15 %.
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