Oxidation numbers |
1 |
What is the oxidation state of each element in the following: |
2 |
Write down the oxidation state of N in the following: |
3 |
Write down the oxidation state of each element in red: |
4 |
Use oxidation numbers to work out the formula of the following ions |
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a | K | 0 | a | N2O | +1 | a | NaClO3 | +5 | a | Chlorate (III) with an overall charge of 1- | ClO2- | ||
b | Br2 | 0 | b | N2O5 | +5 | b | Na2SO3 | +4 | b | Chlorate (VII) with an overall charge of 1- | ClO4- | ||
c | NH4+ | -3 | +1 | c | N2H4 | -2 | c | KMnO4 | +7 | c | Phosphate (III) with an overall charge of 3- | PO33- | |
d | CaF2 | +2 | -1 | d | NO3- | +5 | d | K2MnO4 | +6 | d | Chromate (VI) with an overall charge of 2- | CrO42- | |
e | Al2O3 | +3 | -2 | e | HNO2 | +3 | e | K2Cr2O7 | +6 | ||||
f | NO3- | +5 | -2 | ||||||||||
g | PO43- | +5 | -2 |