# Problem: Which of the following acids has the weakest conjugate base? a. 3-chlorobenzoic acid,  Ka = 1.5x10-4b. hypochlorous acid, Ka = 2.9x10-8c. formic acid, Ka = 1.86x10-4d. chloroacetic acid, Ka = 1.26x10-3e. nitrous acid,  Ka = 4.5x10-4

###### FREE Expert Solution

We're being asked to identify which of the given acids has the weakest conjugate base.

Recall: The stronger an acid, the weaker its conjugate base, and, conversely, the stronger a base, the weaker its conjugate acid

We need to identify the strongest acid among the given. We can compare their Ka values:

###### Problem Details

Which of the following acids has the weakest conjugate base?

a. 3-chlorobenzoic acid,  Ka = 1.5x10-4

b. hypochlorous acid, Ka = 2.9x10-8

c. formic acid, Ka = 1.86x10-4

d. chloroacetic acid, Ka = 1.26x10-3

e. nitrous acid,  Ka = 4.5x10-4

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. You can view video lessons to learn Ka and Kb. Or if you need more Ka and Kb practice, you can also practice Ka and Kb practice problems.