Answer to Question #200689 in General Chemistry for kashish

Question

Study the following equations and identify the oxidized substances, reduced substances, oxidant and reductant.

(a)Fe 2 O 3(s) +3CO \; \ 2Fe (s) +CO 2(g);

(b)SO 2(g) +2H 2 S (g); LH 2 O (l) +3S (s);

(c)C (s) +H 2 O (g) \; CO (g) +H 2(g);

(d)CuO (s) +H 2 (g).; Cu (s) +H 2 O (g); MgO + H (g)

(e)Mg 1c +H 2 O (g)

Answer 1

a)Fe₂O₃+3CO-->2Fe+3CO₂

^{+3 +2 0 +4}

oxidation state: (C)= +2 ---> +4

reduction state:(Fe)= +3---> 0

b)SO₂+2H₂S--->2H₂O+3S

^{+4 -2 0}

oxidation state: (S)-2---> 0

reduction state: (S)+4---> 0

c)C+H₂O--->CO+H₂

^{0 +1 +2 0}

oxidation state:(C) 0---> +2

reduction state:(H₂) +1----> 0

d)CuO+H₂--->Cu+H₂O

^{+2 0 0 +1}

oxidation state:(H2):0------> +1

reductionstate:(Cu):+2 ----> +2

e)MgO+H2--->Mg+H2O

^{+2 0 0 +1}

oxidation state:(H2) 0----> +1

reduction state:(Mg) +2--->0