QUESTION 5 Given the following Ka values which anion is the

QUESTION 5 Given the following Ka values, which anion is the strongest base? Acid HCOOH HNO2 HF CH3COOH 1.8 x 10 HCN 1.7x 10-4 4.5 x 10-4 7.1 x 10-4 -5 4.9 x 10-10 HCOO NO2 O F- CH3COO CN

Solution

HCN being the weakest acid among all ,due to the smallest dissociation constant will produce the strongest conjugate base ,hence ,CN- is the strongest base