The hydrogen oxalate ion (HC2O4-) is amphiprotic. Write a balanced chemical equation showing how it acts as an acid toward water. Express your answer as a chemical equation. Identify all of the phases in your answer.
1. Write another equation showing how it acts as a base toward water. Express your answer as a chemical equation. Identify all of the phases in your answer.
2. What is the conjugate acid of HC2O4-?
3. What is HC2O4- conjugate base?