Question

The following oxidation-reduction reactions take place in basic medium. For each reaction, (i) Assign oxidation state for each atom in the equation; (ii) Indicate oxidation half-equation and reduction half-equation; (iii) Balance the equation by half-equation method; (iv) Indicate which reactant is oxidizing agent and which reducing agent. (v) State and verify whether the pH of the medium decreases, increases, or remains constant as the reaction proceeds. a) Cr(OH)4- + H2O2 \rightarrow CrO4^{2-} + H2O b) Fe(OH)3 + OCl- \rightarrow FeO4^{2-} + Cl-

          The following oxidation-reduction reactions
take place in basic medium. For each reaction,
(i) Assign oxidation state for each atom in the
equation; (ii) Indicate oxidation half-equation
and reduction half-equation; (iii) Balance the
equation by half-equation method; (iv) Indicate
which reactant is oxidizing agent and which
reducing agent. (v) State and verify whether
the pH of the medium decreases, increases, or
remains constant as the reaction proceeds.
a) Cr(OH)4- + H2O2 \rightarrow CrO4^{2-} + H2O
b) Fe(OH)3 + OCl- \rightarrow FeO4^{2-} + Cl-

The following oxidation-reduction reactions
take place in basic medium. For each reaction,
(i) Assign oxidation state for each atom in the
equation; (ii) Indicate oxidation half-equation
and reduction half-equation; (iii) Balance the
equation by half-equation method; (iv) Indicate
which reactant is oxidizing agent and which
reducing agent. (v) State and verify whether
the pH of the medium decreases, increases, or
remains constant as the reaction proceeds.
a) Cr(OH)4- + H2O2 →CrO4^2- + H2O
b) Fe(OH)3 + OCl- →FeO4^2- + Cl-

Added by Mariano W.

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