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What is the oxidation number of iron in each of these compounds?
Fe(OH)3
FeCl2
Fe3(PO4)2
FeSO4
+1
+2
+3
-3
-2
-1
What is the oxidation number of carbon in each of these compounds?
CO
CO2
H2CO3
C
CH4
+1
+2
+3
+4
-2
-1
0
In the reaction MgCl2(l) ➝ Mg(s) + Cl2(g) , the oxidising agent is .......
Identify ONE substance being oxidised, ONE being reduced, ONE spectator ion, ONE oxidising agent and ONE reducing agent from the list of possible answers.
Note that not all of the listed substances need to be used and some may be used more than once.
Fe
Fe2+ ions
H2
H+ ions
Cl− ions
Cl2
Substance being oxidised
Substance being reduced
Spectator ion
Oxidising agent
Reducing agent
For the following redox reaction, select the appropriate oxidation and reduction half-reaction:
Fe → Fe2++ 2e-
Na++ e- → Na
Fe2+ + 2e- → Fe
Na → Na++ e-
Fe3+ + 3e- → Fe
Fe → Fe3++ 3e-
Fe2+ → Fe3++ e-
Fe3+ + e- → Fe2+
oxidation half-reaction
reduction half-reaction
