Скачать или смотреть Making sulfuric acid (method 1)

In this video we are making sulfuric acid by bubbling sulfuric acid.

I forgot adding the explanations while editing. Here you go:

S + O2 -------} SO2
SO2 + H2O ----------} H2SO3
H2SO3 + H2O2 ---------} H2SO4 + H2O

Overall reaction:

S + O2 + H2O2 ---------} H2SO4

This reaction cannot be carried out by simply dumping sulfur into hydrogen peroxide while bubbling oxygen trough it. The sulfur has to be converted to sulfur dioxide first followed by dissolving the resulting gas in hydrogen peroxide.

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