Rank the compounds below in order of increasing oxidation level (1 = lowest oxidation level, 4 = highest oxidation level). if two compounds are at the same oxidation level, give them the same rank. (for example, an answer might be of the form 1,1,3,4 or 1,2,2,4.)

The rank is; (C) > (A) = (B) = (D)

A) CH3CH2CH2NH2

B) CH3CH2CH2Br

C) CH3C=OCH2Cl

D)BrCH2CH2CH2Cl

Explanation:

Two Key Rules!

1.   In a C-H bond, the H is treated as if it has an oxidation state of +1. This means that every C-H bond will decrease the oxidation state of carbon by 1.

2.   Any two bonds between the same atom do not affect the oxidation state (recall that the oxidation state of Cl in Cl-Cl (and that of H in H-H) is zero. So a carbon attached to 4 carbons has an oxidation state of zero.

When calculating the oxidation state in an organic compound, your attention to be directed towards the carbon bearing the functional group. form there, apply the oxidation rules.

Oxidation Rules:

Every Bond between C and an electronegative element (C, N, O) would increase its oxidation by 1.

Every Bond between C and H would decrease its oxidation state by 1.

Every Bond between C and C does not alter its oxidation state so it is ignored in the solvings.

A)

The functional group is the Amine group hence emphasis is on the last Carbon. It is attached to 2 Hydrogen (-1) and a Nitrogen (+1).

2H+N =C

2(-1)+ 1 = C

-2 +1 = C

-1 = C

C= -1

B)

The functional group is the bromine hence emphasis is on the last Carbon. It is attached to 2 Hydrogen (-1) and a Bromine (+1).

2H+ Br =C

2(-1) +1 = C

-2 +1 = C

-1  = C

C = - 1

C)

The functional group is the Carbonyl group hence emphasis is on the middle Carbon.

Since there are two oxygen atoms it would increase it by 2 * 1 = + 2

D)

The functional group is the Chlorine group hence emphasis is on the last Carbon. It is attached to 2 Hydrogen (-1) and a Chlorine (+1).

2H +Cl = C

2(-1) +1 = C

-2 + 1 = C

C = −1

the answer is either b or c

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !