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volume strength of H2O2 -
Volume or percentage strength of hydrogen peroxide is a term to express concentration of H2O2 in terms of volumes of oxygen gas ,based on its decomposition to form water and oxygen.
2H2O2 = 2 H2O + O2
Suppose we have a solution of M moles of H2O2 in 1L solution
From the reaction stoichiometry, 2 moles of H2O2 gives 1mol of oxygen or 22.4L at S.T.P
1mole of H2O2 = 11.2 L of O2
M mole of H2O2 = 11.2 x M L of O2
1L of H2O2 gives =11.2 x M L of O2
Vol strength of H2O2 = 11.2 x M
In terms of Normality, N
n factor for H2O2 is 2
N = M x n or N = M x 2
V S = 11.2 M = 11.2 x N/2 = 5.6 Na
-
Let:-
2 moles of H2O2=22.4 L of oxygen at STP
That means
OR
Mole of O2 gas formed=
mole of H2O2 present in 1 litre solution=1
mass of H2O2 in 1 litre solution= 1X34=34 gm
%
%
Option 1)
13.6%
Option 2)3.4%
Option 3)34%
Option 4)1.7%