Question

The following reactions all have K < 1.

1) CN^-(aq) + C₆H₅OH (aq) ---> HCN (aq) + C₆H₅O^-(aq)
2) ClO^-(aq) + C₆H₅OH (aq) ---> C₆H₅O^-(aq) + HClO (aq)
3) HCN (aq) + ClO^-(aq) ---> HClO (aq) + CN^-(aq)

Arrange the substances based on their relative BASE strength.

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C6H5O- ClO- HCN HClO C6H5OH CN-		strongest base intermediate base weakest base not a Bronsted-Lowry base

The following reactions all have K > 1.

1) HCOO^-(aq) + HNO₂(aq) ---> HCOOH (aq) + NO₂^-(aq)
2) C₆H₅COO^-(aq) + HNO₂(aq) ---> NO₂^-(aq) + C₆H₅COOH (aq)
3) HCOOH (aq) + C₆H₅COO^-(aq) ---> C₆H₅COOH (aq) + HCOO^-(aq)

Arrange the substances based on their relative base strength.

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C6H5COO- HNO2 NO2- C6H5COOH HCOO- HCOOH		strongest base intermediate base weakest base not a Bronsted-Lowry base

Answer 1

Strongest acid have weakest base and weakest acid has strongest base.

1.

From given reaction (K<1)

Hence,

C₆H₅O^- can take proton from both HClO and HCN .

CN^- can only take proton from HClO.

Hence,

Strongest base : C₆H₅O^- .

Intermediate base : CN^-

Weakest base : ClO^-

Not a Bronsted-Lowry base : HCN , C₆H₅OH , HClO.

2.

For given reaction K>1

C₆H₅COO^- can accept proton from both HNO₂ and HCOOH.

HCOO^- can accept proton only from HNO₂ .

Hence,

Strongest base : C₆H₅COO^- .

Intermediate base : HCOO^-

Weakest base : NO₂^-

Not a Bronsted-Lowry base : HNO₂ , HCOOH, C₆H₅COOH.