1. The element bromine was first prepared by oxidation of aqueous potassium brom

Question

1. The element bromine was first prepared by oxidation of aqueous potassium bromide with solid manganese(IV) oxide. Write a balanced net ionic equation for the reaction in aqueous acidic solution. (Mn2+ is also formed)

2. The first preparation of chlorine was similar to the synthesis of elemental bromine (Problem no.1). A later method entailed the reaction of hydrogen chlorine and oxygen at 400 celcius. Write a balanced equation for the reaction. (Water is also formed)

Thank you!

Explanation / Answer

2 KBr + MnO2 + 3 H2SO4 ==> Br2 + 2 KHSO4 + MnSO4 +2 H2O

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