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Sometimes it happens that when H(2)S ga...

Sometimes it happens that when `H_(2)S ` gas is passed into solution in dii, `HCI` yellowish white turbility appears .What do you conclude ? What preperation are takes to check this turbidity?

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This yellowish white turbidity is due to colloidal sulphur , formed by oxidation of `H_(2)S` by the prersence of `NO_(3)^(-)` or `NO_(2)^(-)` or `SO_(3)^(2-)`
`H_(2)S+HNO_(3)tounderset(colloidal)(S)`
Before passing `H_(2)S gas solution is boiled so as to decompose these radicals.
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