Question

Concentration (M)--> 0.010, 0.050, 0.10, 0.50,1.00

pH of Acid 1--> 3.44, 3.09, 2.94, 2.69, 2.44

pH of Acid 2--> 2.00, 1.30, 1.00, 0.30,0.00

pH of Acid 3--> 2.92, 2.58, 2.42, 2.08, 1.92

pH of Acid 4--> 3.86, 3.51, 3.11, 2.96, 2.73

The pH of solutions of four acids prepared at various concentrations were measured and recorded in the table above.

For which acid is the value of the acid-dissociation constant, K_a , the smallest & explain?

-Acid 1

-Acid 2

-Acid 3

-Acid 4

Answer 1

Acid 2 since the values recorded are the lowest