Science(chemical)救我!!!

Hoi Yan

2009-04-02 5:20 am

barium chloride solution BaCl2氯化鋇+ hydrogen peroxide H2O2過氧化氫/雙氧水+Sulphur dioxide(SO2)=barium sulphate (BaSO4)即white precipitate
equation點寫??

回答 (2)

老爺子

2009-04-02 6:18 am

✔ 最佳答案

There should be two equations. Firstly, redox reaction occurs between hydrogen peroxide and sulphur dioxide to give sulphuric acid. Secondly, sulphuric acid reacts with barium chloride to give barium sulphuric acid.
H2O2(aq) + SO2(g/aq) → H2SO4(aq)
H2SO4(aq) + BaCl2(aq) → 2HCl(aq) + BaSO4(s)

The ionic equations should be:
H2O2(aq) + SO2(g/aq) → 2H+(aq) + SO42-(aq)
Ba2+(aq) + SO42-(aq) → BaSO4(aq)

Someone may write the two equations into one.
H2O2(aq) + SO2(g/aq) + BaCl2(aq) → BaSO4(s) + 2HCl(aq)
But strictly speaking, this is incorrect.
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So Much

2009-04-02 5:58 am

BaCl2 + H2O2 --> BaO2 + 2HCl

BaO2 + SO2 --> BaSO4

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