Question

Assign oxidation states to each atom in each of the following species. Part A MnO4− Part...

Assign oxidation states to each atom in each of the following species. Part A MnO4− Part B HCO3−

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Homework Answers

Answer #1

1) given MnO4-

we know that

oxygen with metals exist in the -2 state

so

oxidation state of O atom = -2

now

we know that

sum of all oxidation states = overall charge

so

oxidation state of Mn + ( 4 x oxidation state of O) = -1

so

oxidation state of Mn + ( 4 x -2) = -1

oxidation state of Mn = 7


so

oxidation state of Mn = 7

oxidation state of 0 = -2


2) given HC03-


we know that

oxidation state of O = -2

oxidation state of H = +1

now

sum of oxidation states = overall charge

so

oxidation state of H + oxidation state of C + ( 3 x oxidation state of O ) = -1

so

1 + oxidation state of C + ( 3 x -2) = -1

oxidation state of C = 4

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