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Complete and balance the following equation.
K₂Cr₂O₇ + H₂SO₄ + H₂S → ____ + ____ + ____ + ____
$\text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 + \text{H}_2\text{S} \rightarrow$ ____ + ____ + ____ + ____
Answer
Answer
Equation: $\mathrm{K_{2}Cr_{2}O_{7}} + 4\mathrm{H_{2}SO_{4}} + 3\mathrm{H_{2}S} \longrightarrow \mathrm{K_{2}SO_{4}} + \mathrm{Cr_{2}(SO_{4})_{3}} + 7\mathrm{H_{2}O} + 3\mathrm{S}$
Acidified potassium dichromate oxidises hydrogen sulphide to sulphur.