CHEMISTRY

Hello there! I was wondering if you could check my answers for me? I was having trouble and I finally understand.


1. Indicate the oxidation number of carbon and sulfur in the following compounds.
A) CO= +2
C) Na2CO3= +4
E) CH4= -4
G) SO2= +4
I) Na2SO4= +6
K) Na2S303= +2
M) SCl2= +2
O) SOCl2= +4

2.) Indicate the oxidation number of phosphorous, iodine, nitrogen, tellurium, and silicon.

b) PO3^3-= +3
d) P3O10^5-= +5
f) IO2^-= +3
h) NH4^+= -3
j) NO2^-= +3
l) NO2^+= +5
N) TeO4^2-= +6


3.) Indicate the oxidation number of the metallic elements in the following compounds.

a) Fe2O3= +3
c) CoS= +2
e) K3CoCl6= +3
G) CrO3= +6
I) K2Cr2O7= +6
K) K2MnO4= +6
M) MnO2= +4
O) Pb04= +8


Thank you so much! I have a quiz tomorrow and I want to make sure I am practicing everything correctly.

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  1. 1. Indicate the oxidation number of carbon and sulfur in the following compounds.
    A) CO= +2
    C) Na2CO3= +4
    E) CH4= -4
    G) SO2= +4
    I) Na2SO4= +6
    K) Na2S303= +2 OK if that is Na2S2O3
    M) SCl2= +2
    O) SOCl2= +4

    2.) Indicate the oxidation number of phosphorous, iodine, nitrogen, tellurium, and silicon.

    b) PO3^3-= +3
    d) P3O10^5-= +5
    f) IO2^-= +3
    h) NH4^+= -3
    j) NO2^-= +3
    l) NO2^+= +5
    N) TeO4^2-= +6


    3.) Indicate the oxidation number of the metallic elements in the following compounds.

    a) Fe2O3= +3
    c) CoS= +2
    e) K3CoCl6= +3
    G) CrO3= +6
    I) K2Cr2O7= +6 yes, for each Cr
    K) K2MnO4= +6
    M) MnO2= +4
    O) Pb04= +8 OK if you meant this but I've never heard of PbO4. You may have meant (PbO4)^2-
    They look ok to me except for those notes I made.

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    posted by DrBob222
  2. i meant Pb304…sorry, my mistake

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    2. 👎 0
    posted by Alex
  3. For Pb3O4, Pb is overall a 8/3 for each Pb. You can read about how this happens here. Pb3O4 is a mixture.

    https://answers.yahoo.com/question/index?qid=20130525034348AA6MFHx

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    posted by DrBob222

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