To make copper oxalate (CuC₂O₄), you will need to react a soluble copper source with oxalic acid. Here are the steps to prepare approximately 10 grams of copper oxalate:
### Materials Needed
1. **Copper(II) sulfate pentahydrate (CuSO₄·5H₂O)** or any soluble copper salt
2. **Oxalic acid dihydrate (C₂H₂O₄·2H₂O)** or sodium oxalate
3. **Distilled water**
4. **Beakers and stirring rod**
5. **Filtration apparatus (e.g., filter