Explanation:
In a phenolic indicator, the hydrogen atom is attached to more electronegative atom which is oxygen atom (O atom). So, when a phenolic indicator loses a proton then a conjugate base is formed.
This conjugate base is much more stable due to the resonance stabilization.
Therefore, we can conclude that proton attached to oxygen atom is much more stabilized than any other protons in a phenolic indicator.
Answer:
Carbon dioxide and acetoacetic acid
Explanation:
Oxaloacetic acid is a β-keto acid. It decarboxylates readily via a six-membered cyclic transition state.
The initial products are carbon dioxide and the enol of a ketone.
The enol is unstable and rapidly tautomerizes to the more stable keto form — acetoacetic acid.
