Question

Write correctly balanced equation for the following reaction using half reactions:

$bold 1 bold. bold space bold Bi bold left parenthesis bold s bold right parenthesis bold space bold plus bold space bold NO subscript bold 3 superscript bold minus bold space bold plus bold space bold H to the power of bold plus bold space bold space bold space bold rightwards arrow bold space bold space bold space bold NO subscript bold 2 bold space bold plus bold space bold Bi to the power of bold 3 bold plus end exponent bold space bold plus bold space bold H subscript bold 2 bold O bold 2 bold. bold space bold I to the power of bold minus bold O subscript bold 2 bold left parenthesis bold g bold right parenthesis bold space bold plus bold space bold H subscript bold 2 bold O bold space bold space bold space bold rightwards arrow bold space bold space bold space bold I subscript bold 2 bold space bold plus bold space bold OH to the power of bold minus bold 3 bold. bold space bold Cu bold left parenthesis bold s bold right parenthesis bold space bold plus bold space bold Au to the power of bold plus bold space bold space bold rightwards arrow bold space bold space bold space bold Au bold left parenthesis bold s bold right parenthesis bold space bold plus bold space bold Cu to the power of bold 2 bold plus end exponent$

Solution

bold 1 bold. bold Oxidation bold space bold half bold space bold reaction bold i bold right parenthesis bold space bold Ba bold left parenthesis bold s bold right parenthesis bold space bold rightwards arrow bold space bold Bi to the power of bold 3 bold plus end exponent bold space bold plus bold 3 bold e to the power of bold minus bold ii bold right parenthesis bold space bold Reduction bold space bold half bold space bold reaction bold left square bracket bold NO subscript bold 3 superscript bold minus bold space end superscript bold plus bold 2 bold H to the power of bold plus bold space bold plus bold e to the power of bold minus bold rightwards arrow bold NO subscript bold 2 bold space bold plus bold H subscript bold 2 bold O bold right square bracket bold space bold x bold 3 bold Net bold space bold Reaction bold Bi bold left parenthesis bold s bold right parenthesis bold space bold plus bold 3 bold NO subscript bold 3 superscript bold minus bold space bold plus bold 6 bold H to the power of bold plus bold space bold rightwards arrow bold Bi to the power of bold 3 bold plus end exponent bold space bold plus bold 3 bold NO subscript bold 2 bold plus bold 3 bold H subscript bold 2 bold O

bold 2 bold. bold i bold right parenthesis bold space bold Oxidation bold space bold half bold space bold minus bold reaction bold left square bracket bold 2 bold I to the power of bold minus bold space bold rightwards arrow bold space bold I subscript bold 2 bold plus bold 2 bold e to the power of bold minus bold right square bracket bold space bold x bold space bold 2 bold ii bold right parenthesis bold space bold Reduction bold space bold half bold minus bold reaction bold O subscript bold 2 bold left parenthesis bold g bold right parenthesis bold space bold plus bold 2 bold H subscript bold 2 bold O bold space bold plus bold 4 bold e to the power of bold minus bold space bold rightwards arrow bold 4 bold OH to the power of bold minus bold Net bold space bold Reaction bold colon bold 4 bold I to the power of bold minus bold O subscript bold 2 bold left parenthesis bold g bold right parenthesis bold space bold plus bold 2 bold H subscript bold 2 bold O bold space bold rightwards arrow bold 2 bold I subscript bold 2 bold space bold plus bold 4 bold OH to the power of bold minus

bold 3 bold. bold left parenthesis bold i bold right parenthesis bold space bold Oxidation bold space bold half bold minus bold reaction bold Cu bold left parenthesis bold s bold right parenthesis bold space bold rightwards arrow bold Cu to the power of bold 2 bold plus end exponent bold space bold plus bold 2 bold e to the power of bold minus bold ii bold right parenthesis bold space bold Reduction bold space bold half bold space bold reaction bold Au to the power of bold plus bold space bold plus bold e to the power of bold minus bold rightwards arrow bold Au bold left parenthesis bold s bold right parenthesis bold right square bracket bold space bold x bold space bold 2 bold Net bold space bold reaction bold colon bold Cu bold left parenthesis bold s bold right parenthesis bold space bold plus bold 2 bold Au to the power of bold plus bold space bold rightwards arrow bold 2 bold Au bold left parenthesis bold s bold right parenthesis bold space bold plus bold Cu to the power of bold 2 bold plus end exponent

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