Potassium oxalate can behave as both an acid and a base depending on the context.
1. Acidic Properties: When dissolved in water, potassium oxalate can undergo hydrolysis to release oxalate ions and hydrogen ions (H?). This dissociation can make the solution acidic.
2. Basic Properties: Potassium oxalate can also act as a weak base. It can accept protons (H? ions) from stronger acids, forming oxalic acid and a potassium salt of the stronger acid. In this case, potassium oxalate acts as a base by accepting a proton.
Overall, potassium oxalate exhibits amphoteric properties, meaning it can react as both an acid and a base depending on the circumstances.
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