Respuesta :

3H₂S + 8H⁺ + Cr₂O₇⁻² → 3S + 2Cr⁺³ + 7H₂O this is the balanced chemical equation

What is Balanced Chemical Equation ?

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

The given chemical equation is

Cr₂O7+ H₂S → Cr³+S

Now, assign the oxidation number to each atom in the given equation.

[tex]\overset{+6}{Cr} \overset{-2}{O_7} + \overset{+1}{H} \overset{-2}{S} \rightarrow \overset{+3}{Cr} + \overset{0}{S}[/tex]

Now separate the half reaction and balance the elements other than H and O.

H₂S → S

Cr₂O₇⁻² → 2Cr⁺³

Now, add water to balance oxygen

H₂S → S

Cr₂O₇⁻² → 2Cr⁺³ + H₂O

Now balance hydrogen by adding H⁺

H₂S → S + 2H⁺

14H⁺ + Cr₂O₇⁻² → 2Cr⁺³ + 7H₂O

Now, balance the charge

H₂S → S + 2H⁺ + 2e⁻

6e⁻ + 14H⁺ + Cr₂O₇⁻² → 2Cr⁺³ + 7H₂O

Now, balance the atoms multiply by 3

3 [H₂S → S + 2H⁺ + 2e⁻]

3H₂S → 3S + 6H⁺ + 6e⁻

6e⁻ + 14H⁺ + Cr₂O₇⁻² → 2Cr⁺³ + 7H₂O

Now, add both the half reaction

3H₂S + 6e⁻ + 14H⁺ + Cr₂O₇⁻² → 3S + 6H⁺ + 6e⁻ + 2Cr⁺³ + 7H₂O

Now, simplify the equation

3H₂S + 8H⁺ + Cr₂O₇⁻² → 3S + 2Cr⁺³ + 7H₂O

Thus from the above conclusion we can say that 3H₂S + 8H⁺ + Cr₂O₇⁻² → 3S + 2Cr⁺³ + 7H₂O this is the balanced chemical equation.

Learn more about the Balanced chemical equation here: brainly.com/question/26694427

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