Question

1. The following reactions all have K > 1.
1) C₉H₇O₄^-(aq) + HF (aq) --> F^-(aq) + HC₉H₇O₄(aq)
2) C₉H₇O₄^-(aq) + HNO₂(aq) --> HC₉H₇O₄(aq) + NO₂^-(aq)
3) HF (aq) + NO₂^-(aq) --> HNO₂(aq) + F^-(aq)


Arrange the substances based on their relative base strength.

NO2- HC9H7O4 F- HF HNO2 C9H7O4-

strongest base intermediate base weakest base not a Bronsted-Lowry base

2.The following reactions all have K > 1.
1) C₆H₅COO^-(aq) + HF (aq) --> C₆H₅COOH (aq) + F^-(aq)
2) C₆H₅O^-(aq) + HF (aq) --> F^-(aq) + C₆H₅OH (aq)
3) C₆H₅COOH (aq) + C₆H₅O^-(aq) --> C₆H₅OH (aq) + C₆H₅COO^-(aq)

Arrange the substances based on their relative base strength

C6H5COOH C6H5COO- F- HF C6H5OH C6H5O-

strongest base intermediate base weakest base not a Bronsted-Lowry base

Answer 1

Q1. Strongest base : C₉H₇O₄^-

intermediate base : NO₂^-

weakest base : F^-

not a Bronsted-Lowry base : HC₉H₇O₄ , HF , HNO₂

Q2. Strongest base : C₆H₅O^-

intermediate base :C₆H₅COO^-

weakest base : F^-

not a Bronsted-Lowry base : C₆H₅OH , C₆H₅COOH , HF

Explanation

Strong acids (like HF) have weaker conjugate bases

Weak acids (like C₆H₅OH) have strong conjugate bases