Question

Balance the following equations by using OH- but not H^+

A) PbO2 + Cl^- --> CLO^- + Pb(OH)3^-

B) HNO2 + SbO^+ --> NO + Sb2O5

C) Ag2S + CN^- + O2 --> S + Ag(CN)2^- + OH^-

D) HO2^- + Cr(OH)3^- --> CrO4^2- + OH-

E) ClO2 + OH^- --> ClO2^- + ClO3^-

F) WO3^- + O2 --> HW6O21^-5 + OH^-

G) Mn2O3 + CN^- --> Mn(CN)6^4- + (CN)2

H) Cu^2+ + H2 --> Cu + H2O

Answer 1

A)

Now, we can divide the given reaction into two following parts,

Reduction:

Oxidation:

Therefore, adding up these two we get the following balanced equation,

B)

Now, we can divide the given reaction into two following parts,

Reduction: . . . (1)

Oxidation: . . . (2)

Therefore, by doing   we get the following balanced equation,

C)

Now, we can divide the given reaction into two following parts,

Reduction:   . . . (1)

Oxidation:   . . . (2)

Therefore, by doing   we get the following balanced equation,

D)

In this problem, I am assuming that the left side it is Cr(OH)3 i.e., chromium(III) hyroxide as it a stable form (in the question the formula of the corresponding species is little confusing).

Now, we can divide the given reaction into two following parts,

Reduction: . . . (1)

Oxidation: . . . (2)

Therefore, by doing   we get the following balanced equation,