(English) HOW TO calculate VOLUME STRENGTH OF H2O2 FROM NORMALITY or VICE VERSA?2 H2O2 2 H2O + O2

HOW TO DETERMINE VOLUME STRENGTH OF H2O2 FROM NORMALITY or VICE VERSA?
2 H2O2 gives 2 H2O + O2 Mol. Wt H2O2 = 34
68 g of H2O2 gives 22.4 L O2
1 mol of O2 gas occupies 22.4 L at STP called molar volume
1) Calculate the volume strength of 1.5 N solution? (Equivalent wt H2O2 = 17)
N = (Wt/L )/ Equivalent wt Wt = 25.5 g
25.5 g of H2O2 = 8.4 L of O2
Ans.: Vol strength of H2O2 = 8.4 L
2) 50 ml of an aqueous solution of H2O2 was treated with an excess of KI solution and dil. H2SO4. The liberated I2 required 20 mL 0.1N Na2S2O3 solution for complete reaction. Calculate the volume strength of H2O2
Formula: N1X V1 = N2 X V2
Ans.: Vol. strength of H2O2 = 1.344 L
3) The volume strength of 1N H2O2 is
Equivalent wt of H2O2 = 17
1 N H2O2 contains = 17 g / L
Ans.: Vol strength 1N H2O2 = 5.6 L
4) Calculate the volume strength & normality of 3% w/v of H2O2 solution.
Given: 3 g H2O2 in 100 ml ie 30 g /L
30 g = 9.88 L
N = 1.76 N