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Answer the following.
Complete and balance the following equations: (a) (b)
Complete and balance the following equations:
(a) $\text{K}_2\text{Cr}_2\text{O}_7 + \text{FeSO}_4 + \text{H}_2\text{SO}_4 \rightarrow \underline{\hspace{2em}} + \underline{\hspace{2em}} + \underline{\hspace{2em}} + \underline{\hspace{2em}}$
(b) $\text{KMnO}_4 + \text{KI} + \text{H}_2\text{SO}_4 \rightarrow \underline{\hspace{2em}} + \underline{\hspace{2em}} + \underline{\hspace{2em}} + \underline{\hspace{2em}}$
Answer
Answer
Official answer keyEquations: $\mathrm{K_{2}Cr_{2}O_{7}} + 6\mathrm{FeSO_{4}} + 7\mathrm{H_{2}SO_{4}} \longrightarrow \mathrm{K_{2}SO_{4}} + \mathrm{Cr_{2}(SO_{4})_{3}} + 3\mathrm{Fe_{2}(SO_{4})_{3}} + 7\mathrm{H_{2}O}$ $2\mathrm{KMnO_{4}} + 10\mathrm{KI} + 8\mathrm{H_{2}SO_{4}} \longrightarrow 6\mathrm{K_{2}SO_{4}} + 2\mathrm{MnSO_{4}} + 8\mathrm{H_{2}O} + 5\mathrm{I_{2}}$
Both equations are completed and balanced.
From ISC 2026 Specimen Chemistry Paper 1, question 13(i).
Check your working with the Chemical equation balancer: balance any equation, ionic and redox ones too, with the atom count on each side.