[rentj]

I was asked to predict the reaction of CaC2O4, H2SO4, and KMnO4 on a titration. Please correct me if I am wrong. Based on my understanding, CaC2O4 is more soluble in acid, thus dissociating into C₂O₄^2-. The oxidation state of carbon in oxalate is +3, thus oxidized by MnO4- into oxidation state of +4 (carbon). All of the +4 oxidation state carbon compounds are CO2 and CO3^2-. There is no information whether gas is produced in the reaction or not. Thus, I answered it forms carbonate ions. However, I did a quick search on Google and some says it produces CO2 instead of carbonate. Can you help me? Thank you.

[Babcock_Hall]

Can you think of a way that CO₃^2- might be converted into CO₂?