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Calculate Oxidation Numbers

Calculate Oxidation Numbers

6. Chemical Quantities & Aqueous Reactions / Calculate Oxidation Numbers / Problem 5

What is the oxidation state of each element of the following compounds?
1) CH₂Cl₂
2) (NH₄)₂ CrO₄
3) CuCO₃
4) BaO
5) K₂Cr₂O₇

A

1) C = 0; H = +1; Cl = –1

2) N = –3; H = +1; Cr = +6; O = –2

3) Cu = +2; C = +4; O = –2

4) Ba = +2; O = –2

5) K = +1; Cr = +6; O = –2

B

1) C = 0; H = +1; Cl = –1

2) N = +3; H = –1; Cr = +6; O = –2

3) Cu = +2; C = +4; O = –2

4) Ba = +2; O = –2

5) K = +1; Cr = –6; O = +2

C

1) C = +2; H = –1; Cl = +1

2) N = –3; H = +1; Cr = +6; O = –2

3) Cu = +2; C = +4; O = –2

4) Ba = +2; O = –2

5) K = +1; Cr = +6; O = –2

D

1) C = +2; H = –1; Cl = +1

2) N = +3; H = –1; Cr = +6; O = –2

3) Cu = +2; C = +4; O = –2

4) Ba = –2; O = +2

5) K = –1; Cr = –6; O = +2

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