Answer: Hydrogen peroxide is unstable and decomposes
Chapter 22, Problem 22.67(choose chapter or problem)
Hydrogen peroxide is unstable and decomposes readily: 2H2O2(aq) 2H2O(l) 1 O2(g) This reaction is accelerated by light, heat, or a catalyst. (a) Explain why hydrogen peroxide sold in drugstores comes in dark bottles. (b) The concentrations of aqueous hydrogen peroxide solutions are normally expressed as percent by mass. In the decomposition of hydrogen peroxide, how many liters of oxygen gas can be produced at STP from 15.0 g of a 7.50 percent hydrogen peroxide solution?
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