# Problem: Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe):2H2O2(aq) → 2H2O(l) + O2(g)What volume of pure O2(g), collected at 27°C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution? Ignore any water vapor that may be present.

###### FREE Expert Solution
• First thing is to find the mass of H2O2 in the reactant. In this case, the solution (125 g) contains 50% H2O2 by weight so there will be 62.5 g of H2O2

(125 g) (0.5) = 62.5 g

• We need to get the molar mass of H2O2 which will be used to find the moles of H2O2

87% (449 ratings) ###### Problem Details

Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe):

2H2O2(aq) → 2H2O(l) + O2(g)

What volume of pure O2(g), collected at 27°C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution? Ignore any water vapor that may be present.