Complete the following reactions:(a) Cr_2O_7 | vedclass

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(A) The reactions are based on the redox properties of the dichromate ion $(Cr_2O_7^{2-})$.$(a)$ In basic medium,dichromate ions are converted to chro

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$(a) \ X = 2OH^-$

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(A) The reactions are based on the redox properties of the dichromate ion $(Cr_2O_7^{2-})$.$(a)$ In basic medium,dichromate ions are converted to chromate ions: $Cr_2O_7^{2-} + 2OH^- 	o 2CrO_4^{2-} + H_2O$. Thus,$X = 2OH^-$.$(b)$ In acidic medium,dichromate acts as an oxidizing agent: $Cr_2O_7^{2-} + 14H^+ + 6e^- 	o 2Cr^{3+} + 7H_2O$. Thus,$X = 6e^-$.$(c)$ Iodide ions are oxidized to iodine: $6I^- 	o 3I_2 + 6e^-$. Thus,$X = 3I_2$.

Complete the following reactions:
$(a) \ Cr_2O_7^{2-} + X \to 2CrO_4^{2-} + H_2O$
$(b) \ Cr_2O_7^{2-} + 14H^+ + X \to 2Cr^{3+} + 7H_2O$
$(c) \ 6I^- \to X + 6e^-$

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Complete the following reactions:$(a) \ Cr_2O_7^{2-} + X \to 2CrO_4^{2-} + H_2O$$(b) \ Cr_2O_7^{2-} + 14H^+ + X \to 2Cr^{3+} + 7H_2O$$(c) \ 6I^- \to X + 6e^-$