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Complete the following chemical equation...

Complete the following chemical equations :
(i) `8MnO_(4)^(-)+3S_(2)O_(3)^(2-)+H_(2)O to `
(ii) `Cr_(2)O_(7)^(2-)+3Sn^(2+)+14H^(+) to `

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(i) `8MnO_(4)^(-)+3S_(2)O_(3)^(2-)+H_(2)O to 8MnO_(2)+6SO_(4)^(2-)+2OH^(-)`
(ii) `Cr_(2)O_(7)^(2-)+14H^(+)+3Sn^(2+) to 2Cr^(3+)+3Sn^(4+)+7H_(2)O`
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