I understand that Bromide is the catalyst but I\'m confused about where the 2H+

Question

I understand that Bromide is the catalyst but I'm confused about where the 2H+ comes from in the reactant.

oted to the search for more effective ance. Extensive r or more effective catalysts for reactions of commercial impor- arch efforts also are devoted to finding means of inhibiting or re- ain catalysts that promote undesirable reactions, such as those that corrode ertain catalysts moving certain catalyst ge our bodies, and cause tooth decay eals a Homogeneous Catalysis Gitljyst that is present in the same phase as the reactants in a reaction mixture is catalyst t a homogeneous catalyst. Examples abound both in solution and in the gas phase. called a homogeneou alled der, for example, the decomposition of aqueous hydrogen peroxide, H,O,(ag Cotsi nto water and oxygen: ). 2 H,O (aq) 2 H2O(l) + 02(g) [14.29] Inthe absence of a catalyst, this reaction occurs extremely slowly. Many substances are capa- le of catalyzing the reaction, however, including bromide ion, which reacts with hydrogen peroxide in acidic solution, forming aqueous bromine and water ( Figure 14.22). 2 Br-(aq) + H2O2(aq) + 2H+ Br(aq) + 2H20(1) [14.30]

Explanation / Answer

Although bromide ions acts as catalyst, they can not be added independent of its cations. Hence, acturally HBr (Hydrobromic acid) is added as catalyst. In HBr, H+ ions accompanied by Br- ions. Hence, H+ ions comes from HBr.

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