CuS + 2O2 ==> CuO + SO3
(S^2- ==> S^6+ + 8e)
(O2 + 4e--> 2O^2-)
You want to make the electron gain/loss equal so multiply eqn 1 by 1 and eqn 2 by 2 like this, then add them together.
1*(S^2- ==> S^6+ + 8e)
2*(O2 + 4e-->2O^2-)_
________________________________________S^2- + 2O2 ==> s^6+ + 4O^2- and rearrange to
S^2- + 2O2 ==> SO3 + O^2- Note that this doesn't contain the cu(II) ion but you can add that if you wish.
CuS is oxidized by molecular oxygen to produce gaseous sulfur trioxide and solid copper (II) oxide. Write 2 balanced half reactions
2 answers
I did it right thank you for confirmation!