The possible oxidation numbers for iron cations are +2 and +3. Oxygen in oxyanions is usually assigned an oxidation number of -2, producing a total negative charge of -14 for the seven oxygen atoms in a dichromate anion. If the iron cation has an oxidation number of +2, the two chromium atoms must have a total oxidation number of +12, which is possible when each chromium atom has an oxidation number of +6. An iron (III) cation would require the chromium atoms to have a non integral charge, which is not possible since electrons with half charges are not known. Therefore, the oxidation number of iron in the compound is +2 and the oxidation number for chromium is +6.
In ferrous dichromate;Fe takes +IICr takes +VIO takes -II
a)3 b)2 c)1 d)4 Fe is the transitional metal K3[Fe(CN)6] , we know that Potassium, K, has an oxidation number of +1 The oxidation number of CN= -1, so 6*CN has an oxidation number of -6 so therefore Fe - 6 = -3 Fe = -3 + 6 = +3 The oxidation number of Fe is +3. so A
+2 O.S. of Fe
It contains only two elements. Fe shows +3 number. Chlorine shows -1 as the oxidation number.
oxidation state of Fe in FeCl3 is +3. Cl has oxidation number -1 in this case Fe share 3 electrons with Cl so its oxidation state is +3.
In ferrous dichromate;Fe takes +IICr takes +VIO takes -II
Cu
a)3 b)2 c)1 d)4 Fe is the transitional metal K3[Fe(CN)6] , we know that Potassium, K, has an oxidation number of +1 The oxidation number of CN= -1, so 6*CN has an oxidation number of -6 so therefore Fe - 6 = -3 Fe = -3 + 6 = +3 The oxidation number of Fe is +3. so A
+2 O.S. of Fe
It contains only two elements. Fe shows +3 number. Chlorine shows -1 as the oxidation number.
oxidation state of Fe in FeCl3 is +3. Cl has oxidation number -1 in this case Fe share 3 electrons with Cl so its oxidation state is +3.
+2 for Fe, -2 for O
+3 for Fe -2 for S
Fe has an oxidation number of+2 in ferrous salts+3 in ferric saltsAs Br has an oxidation number of -1 in bromide, only two salts of Fe with Br are possible:FeBr2 = ferrous bromideFeBr3 = ferric bromideand FeBr DOES NOT EXIST
Fe3O4 can be considered to be 1:1 mixture of FeO and Fe2O3. Oxidation number in FeO: +2 for Fe and -2 of O Oxidation number in Fe2O3: +3 for Fe and -2 of O
+3 for each Fe, -2 for each S
+3 for Fe -2 for S