Question

Write the balance net ionic equation for:

Reaction of V(OH)3 (s) with oxygen in basic solution to produce the final form listed above

Answer 1

V(OH)₃+O_{2 ---------->} VO₂+ H₂O

Oxidation is V(OH) _3----------> VO₂ oxidation state of V is increased

Reduction is O_{2 --------->} H₂O Oxygen oxidation state is decreased

Reduction half cell reaction is O_{2 ---------->} H₂O

a) balance Oxygen atoms   O_{2 ---------->} H₂O + H₂O

b) balance hydrogen atoms  O2 + 4 H₂O---------> 2H₂O + 4 OH^--

c) balance charge   O2 + 4 H₂O + 4e^-------> 2H₂O + 4 OH^-

OXIDATION half cell reaction  V(OH)_{3 ---------->} VO₂

_{a) Blance Oxygen atoms} V(OH)_3---------> VO₂+ H2O

b) balance hydrogen atoms  V(OH)₃ + OH^-- _----------> VO₂+ H2O + H2O

c) balance charge  V(OH)₃+ OH^--_---------> VO₂ +2H2O+ e^--

Net equation.. for balancing charge oxidation half cell reaction is multiplied with 4

4V(OH)₃+4 OH^---------->4 VO₂ +8H2O +4e^--

O2 + 4 H₂O + 4e^-------> 2H₂O + 4 OH^-

By cancellation the charge and OH^-- and H₂O molecule s net equation is 4 V(OH)₃ + O₂-----> 4 VO₂₊6H₂O