Photos H2S O2

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H2s o2. K2cr2o7+h2s+h2s04. C o2 so2 ОВР. 2cr+3h2so4=cr2(so4)3+3h2. H202 k2cr207 h2s04.
K2cr2o7+h2s+h2s04. C o2 so2 ОВР. 2cr+3h2so4=cr2(so4)3+3h2. H202 k2cr207 h2s04.

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