What is the significance of the term ‘20 volume’ H2O2 solution.
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20 volume", means 1 dm3 of peroxide solution produces 20 dm3 oxygen. 20 dm3 oxygen is 20 / 24.47 = 0.817 moles (at 298K and 1 atm) therefore, 1 dm3 of solution must contain 2 x 0.817 = 1.635 moles peroxide. so "20 volume" hydrogen peroxide is 1.635M
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h202 means water 20 means also water water takes volume
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