Question

Which of the following statements about weak acids is false?

a. weak acids ionize only slightly in diute aqueous solution
b. the Ka values for weak acids are numbers that are greater than 1
c. weak acids are mych more numerous than strong acids
d. many weak acids are familiar to us in everyday use
e. the ionization constatnt for a weak acid does not include a term for the concentration of water

Answer 1

The false statement is that Ka values for weak acids are greater than 1; they are actually less than 1 since weak acids only partially ionize in solution.

Step-by-step explanation:

The false statement about weak acids is that 'Ka values for weak acids are numbers that are greater than 1'. Actually, weak acids ionize only slightly in a dilute aqueous solution and have Ka values less than 1. In contrast, strong acids have Ka values that are much larger because they ionize almost completely in solution. A high Ka value indicates a strong acid, not a weak one. Besides, the ionization constant for a weak acid does indeed not include a term for the concentration of water since water is the solvent and its concentration is relatively constant and large.