Question:
Identify conjugate acid and conjugate base for $HCO_3^-$ ion respectively
Identify conjugate acid and conjugate base for $HCO_3^-$ ion respectively
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Amphoteric species like $HCO_3^-$ can act as both an acid and a base.
Updated On: Apr 30, 2026
- $CO_3^{2-}$ and $H_2CO_3$
- $H_2CO_3$ and $CO_2$
- $CO_2$ and $H_2CO_3$
- $H_2CO_3$ and $CO_3^{2-}$
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The Correct Option is D
Solution and Explanation
Step 1: Definition
Conjugate Acid = Base + $H^+$; Conjugate Base = Acid - $H^+$.
Step 2: Analysis
- To find the conjugate acid of $HCO_3^-$, add a proton: $HCO_3^- + H^+ \rightarrow H_2CO_3$. - To find the conjugate base of $HCO_3^-$, remove a proton: $HCO_3^- - H^+ \rightarrow CO_3^{2-}$.
Step 3: Conclusion
The conjugate acid is $H_2CO_3$ and the conjugate base is $CO_3^{2-}$.
Final Answer: (D)
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