Question
How is strength of $H2O2$ solution expressed?
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Answer
Strength of aqueous solution of $H_2O_2$ is expressed in ‘volume’ units i.e., volume strength.
The commercially marketed $30\% ($ by mass $)$ solution of $H_2O_2$ has volume strength of $100$ volume.
It means that $1 \ mL$ of $30\%$ solution of $H_2O_2$ will give $100 \ mL$ oxygen at $\text{STP.}$
Thus, Volume strength refers to the volume of oxygen $(O_2)$ in litres at $\text{STP}$ obtained by decomposition of $1$ litre of the sample.
The commercially marketed $30\% ($ by mass $)$ solution of $H_2O_2$ has volume strength of $100$ volume.
It means that $1 \ mL$ of $30\%$ solution of $H_2O_2$ will give $100 \ mL$ oxygen at $\text{STP.}$
Thus, Volume strength refers to the volume of oxygen $(O_2)$ in litres at $\text{STP}$ obtained by decomposition of $1$ litre of the sample.
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