Sodium bicarbonate CANNOT be analyzed when paired with sodium hydroxide. Which of the following statement/s CORRECTLY explains this phenomenon?   I. NaHCO3 is an amphoteric salt   II. a mixture of Na2CO3 & NaOH is formed when NaOH is in excess   III. a mixture NaHCO3 & Na2CO3 is formed when NaOH is in excess   I only   I and II   I and III   II only

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