Reaksi reduksi adalah reaksi yang ditandai dengan penurunan bilangan oksidasi.
Terdapat sebagian aturan dalam menentukan bilangan oksidasi (biloks), yaitu:
- Bilangan oksidasi unsur bebas atau molekul = 0
- Bilangan oksidasi atom O umumnya = -2. Kecuali pada senyawa peroksida dan superoksida. Contoh:
, bilangan oksidasi atom O = -1
- Bilangan oksidasi atom H umumnya = +1. Kecuali pada senyawa hidrida = -1. Contoh:
.
Maka, bilangan oksidasi masing-masing unsur pada reaksi tersebut adalah:
1. Cu
Cu merupakan unsur bebas, maka biloks Cu = 0
2. ![H N O subscript 3](data:image/png;base64,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)
Biloks H sesuai aturan poin 3 = +1
Biloks O sesuai aturan poin 2 = -2
Biloks N dapat dicari dengan perhitungan berikut:
![table attributes columnalign right center left columnspacing 0px end attributes row cell biloks space H and biloks space N plus 3 left parenthesis biloks space O right parenthesis end cell equals 0 row cell left parenthesis plus 1 right parenthesis plus biloks space N plus 3 left parenthesis minus sign 2 right parenthesis end cell equals 0 row cell left parenthesis plus 1 right parenthesis plus biloks space N plus left parenthesis minus sign 6 right parenthesis end cell equals 0 row cell biloks space N end cell equals cell plus 5 end cell end table](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAP8AAABOCAYAAADvnsAaAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAo9ZE6ZAAABs1JREFUeNrtnVGEHVcYx0fEiopSsVZEhaioVbVErIpVJaoiKkpVxT6sUrWqT6VWVZ9KVUVFhT5UxapSKyKi8lJRK/Ky1upDRahYURF5qYoV13J7Pvcbd3Jz5t6ZM+fMzpz5/fhs7ty5c+/5vvOdOefMOf8kCQAAAAAAAEAlVox93pFyrhBugAFvG/ulQ+X9WcvcKvoO5/QDfY+Pa/UDlbktfvkgcJmlgm8Y6xnbMXbD2MmRc/Yb+9vYoZb7M+UjY7e1vLeMLVvOkbLeNTbl+btPGdtUf28ZW6g7+ROSvzV+WTV2JGCZrxqbN7ZPk/wTY9sj50gDdDECf0oZfzP2rbEZPSZ/v9Hj+0bOvzim8XXhmLE7xk7o6xPawBwj+Ul+27VmtAGoq8zSADwaObZm7GwE/pRx/KWc936wzGec1bL74ntLY7Kkx71VmDe1m/avsfcdu2Pnjd1XOz/hGmeMXdeKk/KOfna3QADrSv62+kW+ZzFw8std71VjP1oS/aGxgxH4U7rZsznvyfE/R449Z2kIs79rnNkQX01bhhfbPpNfJmZe1IB+p+OMMkE5pXebAzrmWbWMTdLPSNDXLZXjP2NHS/zmMo7sO36mjX5JWc10VROPfsl+7n7Ob9uNxJ+9CY3fTsnPlGXX4XdV6iY9b+z3kkERJx/OvJZK94flMx8b+2tkIihFxjafaWCb2O1vm1/kuy4HvvO/pt3c+YLJ3zZ/NjX5n4QcPz8pGZReASf0dYx0y9IaCy/rew+MvdXQMX/b/LKY6RqHGvNP6yRUlgea3G33p3T7X8l5T45vjhw7qEMeX93+u5Zu/7QOB4Ik/xFLoSYF5eZIFzOvRRY+1PfyWt4zGpimJX9b/ZJ2/0Mlv9wBHztM+LXBn5/qxF7ehN9KDRN+S5YJv0s+k/9rYy+oo2SxwmnHsdiUXmPcWEx4Lxk8Hz6Q06I2Jflj8MthnZTz5ZfrmW6+3N3lsdfoY728R31t86ftUZ/484Jed3+BZK1C+qhvTl/P613f26M+mQB5V8dIMov4RoFKkTcL+4+xe+r0SdeQLteVjAPT7s92Dd3+rvll0aNf5O62oeNRKddXliSY0i7roZb7M2U5GS5sWtdexSgzmqi+F/ks6PCjpz2lhQSg4bC8F6DDdGXDyxfJ4AkCAAAAAAAAAAAAAAAAAABUpy4RSUQcuxt/Yt9A6l5lxiqv7saf2DcIm4hkHkXXvR9PBqu5tnLeLyPiiIio+zmuIqKuyH6G9WS4tl921R2sEPsyBBXwjBXbzrKqlV92kS1NOL+oiCMiou6/xVVE1BXZyfh6MhTslGuvVYh9UYILeMaKbU+5r8rfn3CXWOt48jdVRNQXeSo+rRPwjBWbiGQdyT9OxNElERARHZ+EZUREfXE0savptE7AM1Z2J1Qwl2AUraA9T9+JiKhfEdEqiZjlmrFzJWLvuw73SG/35A955y8aHERE/dz5y4iIVkUaxUmz+q0S8IwVm4hkHck/TsTRRxcYEdFnKSoiWoUZ7YW95Bj7Rgp4xkqME36IiOb3AB5XiP8kRHfwiv5NPMS+KMEFPGMlxKO+IucXFXFERNTdL64ioq5cS/IlvF1iX5TgAp6xYhORrMqk7ppvEUdERPPvsC4ioj7jHjr2KQh4OsLyXuLP8t4OU9emC0Qcuxt/Yg8AAAAAAAAAAAAAAAAAUC+IfBJb4tpBWAVIbIlrB0HkszhtE/n0KeCZxu1CMthLIOvsbyeDXY4ucS0DAp6BQORz75I/tMinz119sk//ZibxZAux7K684RjXoiDgGRBEPvcu+UOLfPrcz/+lseUC5yHg2SIQ+RwSm8inTwHPzZxeSpm4IuDZMBD5HI4rYxP59CnguaMN3pb++9dkoBpcNK6+6ycCnoGTP+Sdv2gAEfl098uu53oi4ibH9bX4Sv7jkHN7lPwIeHoAkc/8Ctt2kU+fAp4Pk2eVgkRa7V6JuCLg2TAQ+RwQo8inzwm/y5YhjYzvNxzjWhQEPAOCyOfTY/6YRD59Puqb1aHRbKZxtPkZAc8WgcjnkNhEPn3H9qT2kHa03HOB45qCgGdAWN5LbIlrh0Hkk9gSVwAAAAAAAAAAAAAAAAAAAAAAAIAsXRQgrctnZQVoABqX/EkDk7+KAOleNJgAJL+n31xFgJTkB0i6I0BaRQ+S5Idokz92AVIfPnIRdhUNANFokO3Gc1Q1aHq3vwsCpHUOlURuTIRGRQjkNNUNmj7mj1GAtO5u/ygi/LlFdYMmJ38XBEjrvPNne1R3qG7QtOTvmgBpHcn/U2YOQwQ/ryZ2bUaAPQMB0jDIIqRHyVD486mnKP8Db3bGBU0PTAwAAARXdEVYdE1hdGhNTAA8bWF0aCB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMTk5OC9NYXRoL01hdGhNTCIgY2xhc3M9Indyc19jaGVtaXN0cnkiIHN0eWxlPSJmb250LWZhbWlseTpBcmlhbCI+PG10YWJsZSBjb2x1bW5hbGlnbj0icmlnaHQgY2VudGVyIGxlZnQiIGNvbHVtbnNwYWNpbmc9IjBweCI+PG10cj48bXRkPjxtcm93PjxtaT5iaWxva3M8L21pPjxtbz4mI3hBMDs8L21vPjxtaSBtYXRodmFyaWFudD0ibm9ybWFsIj5IPC9taT48bW8+KzwvbW8+PG1pPmJpbG9rczwvbWk+PG1vPiYjeEEwOzwvbW8+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPk48L21pPjxtbz4rPC9tbz48bW4+MzwvbW4+PG1vPig8L21vPjxtaT5iaWxva3M8L21pPjxtbz4mI3hBMDs8L21vPjxtaSBtYXRodmFyaWFudD0ibm9ybWFsIj5PPC9taT48bW8+KTwvbW8+PC9tcm93PjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1uPjA8L21uPjwvbXRkPjwvbXRyPjxtdHI+PG10ZD48bXJvdz48bW8+KDwvbW8+PG1vPis8L21vPjxtbj4xPC9tbj48bW8+KTwvbW8+PG1vPis8L21vPjxtaT5iaWxva3M8L21pPjxtbz4mI3hBMDs8L21vPjxtaSBtYXRodmFyaWFudD0ibm9ybWFsIj5OPC9taT48bW8+KzwvbW8+PG1uPjM8L21uPjxtbz4oPC9tbz48bW8+LTwvbW8+PG1uPjI8L21uPjxtbz4pPC9tbz48L21yb3c+PC9tdGQ+PG10ZD48bW8+PTwvbW8+PC9tdGQ+PG10ZD48bW4+MDwvbW4+PC9tdGQ+PC9tdHI+PG10cj48bXRkPjxtcm93Pjxtbz4oPC9tbz48bW8+KzwvbW8+PG1uPjE8L21uPjxtbz4pPC9tbz48bW8+KzwvbW8+PG1pPmJpbG9rczwvbWk+PG1vPiYjeEEwOzwvbW8+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPk48L21pPjxtbz4rPC9tbz48bW8+KDwvbW8+PG1vPi08L21vPjxtbj42PC9tbj48bW8+KTwvbW8+PC9tcm93PjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1uPjA8L21uPjwvbXRkPjwvbXRyPjxtdHI+PG10ZD48bWk+Ymlsb2tzPC9taT48bW8+JiN4QTA7PC9tbz48bWkgbWF0aHZhcmlhbnQ9Im5vcm1hbCI+TjwvbWk+PC9tdGQ+PG10ZD48bW8+PTwvbW8+PC9tdGQ+PG10ZD48bW8+KzwvbW8+PG1uPjU8L21uPjwvbXRkPjwvbXRyPjwvbXRhYmxlPjwvbWF0aD4panohAAAAAElFTkSuQmCC)
3. ![Cu open parentheses N O subscript 3 close parentheses subscript 2](data:image/png;base64,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)
Bila terurai akan menjadi ![Cu open parentheses N O subscript 3 close parentheses subscript 2 yields Cu to the power of 2 plus sign plus 2 N O subscript 3 to the power of minus sign](data:image/png;base64,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)
Biloks Cu = muatannya = +2
Biloks O sesuai aturan poin 2 = -2
Maka biloks N dapat dicari dari ion
menggunakan perhitungan:
![table attributes columnalign right center left columnspacing 0px end attributes row cell biloks space N plus 3 left parenthesis biloks space O right parenthesis end cell equals cell negative sign 1 end cell row cell biloks space N plus 3 left parenthesis minus sign 2 right parenthesis end cell equals cell negative sign 1 end cell row cell biloks space N end cell equals cell negative sign 1 plus left parenthesis plus 6 right parenthesis end cell row cell biloks space N end cell equals cell plus 5 end cell end table](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAOcAAABOCAYAAADb5wEGAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAo9ZE6ZAAABgJJREFUeNrtnV+EXUccx4+IFRWhIlZEhaqoVZWXiIqqEhURFaUiIg9Vqlb1qcSq6lOpqqqI0oeKiCpVURGVl6pakZcV0YeqUhFRUXmpqlVruZ2f+zvd09kz556Ze+bcOXc+H3529/yZe8/M73fOb+bMfLcoAAAAAAAA/mPF2LuZXOcKzQ1D4WVjX2V0vV/qNUMPjAKOGUX6HJ+yXu/welxBt2Zsw9i6sZvGjljH7DT2m7G9A6/PkjeN3dbrvWVsueYYudZfjS0k4r+HjL1n7G6uwVkkGJxXjR2IGJzfGjtqbIcG4dvG7lvHyA3i4hzUp1zjd8Y+Nrao2+TnR7p9h3X8xYabY9+IH7wW6WZFcAaWtagNEys4i5qn5CNr2zfGTs1BfUo/8jPHvs9r+tOn9NqH7seDCM6XND3709jZwDTsnLEHaucmlHHS2A11+JJX9NzNFhU9qnzm+cjBKU+NZ419UROIfxjbPQf1KSnhkmOfbP/J2vZYzY2q+r2ajOD0vCgZ0HhCHfFTY8c8nemYPsV2aV9Efn/ecY4462qNU/9l7GBAQ1ytpGKuRhoFOk2574Hju23OSX1uTLg5rXueM40vhgZ2FmntHmPfezqTOMf+yt8SLD/WnPOWsZ+tAZSSX4xdUIf0+c7yWVciPzmf0zTuaMvgHFp9phKcPDlbXNQ/ns600aLxRtp3uVVzlxee1n0PjZ3w/M7nK6lfrD7nvmI8SlnloQbf0OtT0tpnHPtk+x1r225N6Ulrew7OAzWNMcmZfrBSS9edXnhD97nu6CfVoXwbokxvYwWnPEH+DhgQGkJ9vqMDP64BoRUGhGZ3UR8ae1wbWF4yHw/sIy1oGU19JOFMMX5vuMtxpw4Jzv06aNNVcN6opLHydJTXCvZrE9erlKHVZ92rFKnPT7Tcndbxl4rx6wuCMzIycPCq9l3kPd6LLS7cNbr4u7F76iyTypBU61ql4cu0535AWltNb7tqJHk6rGm/Uq7rgxonXdBUd+/A67NkudiaeLGqT2WbRe3PLiQUlH2lzjAwmL4HkDC5TAiXaXIXaG4AAAAAAAAAAAAAAAAA6Ig+RMYQ+ALwpM9ZSswQygxExtxBFyIyForMJ14ttubWinSJvRwNgS+CM5lzmspKVWQsFFmJ80KxJeglZdctDUPgi+BMPjhTFRnrCpcKAus5MwtORMaag8RHZKwrDmqb2CDwlVlwIjLW7Ow+ImNdBcp1Y6cd+xD4yjStRWRs+5PTR2RsWuSmNWlUFoGvjPuciIxtp63I2DQsahbz1ITgReAr0+BEZMz9BG0jMhaK6B5d059NMCCUWXAiMradUJGxUK4XbonMKgh8ZQQiY+4nVIjIWNcDMnbai8AXQEuYvgeQMH1MSkfgCwAAAAAAAAAAAAAAAAAgbfoQTSs/B+E0gJb0/a8dmXk1Q3IUMYtJqLBXm+/tI5rWth6kLPlP4TJHWpYy3i7Gq5+q+1MSTiM4EzmnqaxpRMxiEirs1eZ4n5U+bcqT9a+ypLFcJSVL/2TV1U3ruJSE0wjOAQTnNCJmKdZrm+N91si2Ke99Y8stjktxnWw2wZmDiFnfSggxgtNHNK1NeXcc2YdNk3AaRA7OeRcxm7Z+QoJ6NGW5dedvdlzeut4o7+rvXxdjNcU6NgiV2adfOYiYDTWt3YxQnizqP6R/SxuKYPhpgjNdJ5pHEbN5SGt9RNPapsm2goVI8tyztjUJp0GPwZmDiBkDQmOu1HQlpH+5xoBQOk6Um4jZUIOz61cpS9olWarcVOvaP0XhtCxAxKz7oIyVMncpmlZyRDOfdW2Pw9b+1ITTAJKF6XsACdPXhHSE0wAAAAAAAAAAAAAAAAAAAADmAQS+4tUZ/0AXojtakWBwzlLga9Tz9QLBOajgnKXAF8EJvQUnAl8EJyQanAh8hfUfm4JbtolUi6xxlWVXh3E1mDZFQ+Cr26eiyH6IYJZIvxzH3WBaR0Pgq/uUdV/h/y8agOD8Hwh8xQnOPZodAHg5GgJf3Qfn5Uof+slirAd7BncDHxD4ioNMknik6b1kImfnwVn+BR4Qu2RZGv95AAADynRFWHRNYXRoTUwAPG1hdGggeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzE5OTgvTWF0aC9NYXRoTUwiIGNsYXNzPSJ3cnNfY2hlbWlzdHJ5IiBzdHlsZT0iZm9udC1mYW1pbHk6QXJpYWwiPjxtdGFibGUgY29sdW1uYWxpZ249InJpZ2h0IGNlbnRlciBsZWZ0IiBjb2x1bW5zcGFjaW5nPSIwcHgiPjxtdHI+PG10ZD48bXJvdz48bWk+Ymlsb2tzPC9taT48bW8+JiN4QTA7PC9tbz48bWkgbWF0aHZhcmlhbnQ9Im5vcm1hbCI+TjwvbWk+PG1vPis8L21vPjxtbj4zPC9tbj48bW8+KDwvbW8+PG1pPmJpbG9rczwvbWk+PG1vPiYjeEEwOzwvbW8+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPk88L21pPjxtbz4pPC9tbz48L21yb3c+PC9tdGQ+PG10ZD48bW8+PTwvbW8+PC9tdGQ+PG10ZD48bW8+LTwvbW8+PG1uPjE8L21uPjwvbXRkPjwvbXRyPjxtdHI+PG10ZD48bXJvdz48bWk+Ymlsb2tzPC9taT48bW8+JiN4QTA7PC9tbz48bWkgbWF0aHZhcmlhbnQ9Im5vcm1hbCI+TjwvbWk+PG1vPis8L21vPjxtbj4zPC9tbj48bW8+KDwvbW8+PG1vPi08L21vPjxtbj4yPC9tbj48bW8+KTwvbW8+PC9tcm93PjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1vPi08L21vPjxtbj4xPC9tbj48L210ZD48L210cj48bXRyPjxtdGQ+PG1pPmJpbG9rczwvbWk+PG1vPiYjeEEwOzwvbW8+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPk48L21pPjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1yb3c+PG1vPi08L21vPjxtbj4xPC9tbj48bW8+KzwvbW8+PG1vPig8L21vPjxtbz4rPC9tbz48bW4+NjwvbW4+PG1vPik8L21vPjwvbXJvdz48L210ZD48L210cj48bXRyPjxtdGQ+PG1pPmJpbG9rczwvbWk+PG1vPiYjeEEwOzwvbW8+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPk48L21pPjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1vPis8L21vPjxtbj41PC9tbj48L210ZD48L210cj48L210YWJsZT48L21hdGg+tDDsxwAAAABJRU5ErkJggg==)
4. ![H subscript 2 O](data:image/png;base64,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)
Biloks H sesuai aturan poin 3 = +1
Biloks O sesuai aturan poin 2 = -2
5. ![N O subscript 2](data:image/png;base64,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)
Biloks O sesuai aturan poin 2 = -2
Maka biloks N dapat ditentukan dengan perhitungan:
![table attributes columnalign right center left columnspacing 0px end attributes row cell biloks space N plus 2 left parenthesis biloks space O right parenthesis end cell equals 0 row cell biloks space N plus 2 left parenthesis minus sign 2 right parenthesis end cell equals 0 row cell biloks space N end cell equals cell plus 4 end cell end table](data:image/png;base64,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)
![](https://imgix2.ruangguru.com/assets/miscellaneous/jpg_me3z4r_4119.JPG)
Pada reaksi tersebut, nitrogen mengalami penurunan bilangan oksidasi sehingga hasil reduksinya adalah
.
Jadi, hasil reduksinya adalah
.![undefined](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAFCAYAAABirU3bAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAEx0lWhwAAAAxJREFUeNpjYKABAAAAVQAB8vOvGAAAAE50RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bW8+JiN4QTA7PC9tbz48L21hdGg+SHplFQAAAABJRU5ErkJggg==)