A buffer with a pH of 4.31 contains 0.31 M of sodium benzoate and 0.24 M of benzoic acid. What is the concentration of [ H 3 O ] in the solution after the addition of 0.060 mol HCl to a final volume of 1.3 L

The hydronium ion concentration in the solution is

Explanation:

To calculate the molarity, we use the equation:

Moles hydrochloric acid solution = 0.060 mol

Volume of solution = 1 L

Putting values in above equation, we get:

The chemical reaction for aniline and HCl follows the equation:

Initial:           0.24          0.060              0.31

Final:             0.18          -                     0.37

To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:

We are given:

= negative logarithm of acid dissociation constant of benzoic acid = 4.2

pH = ?

Putting values in equation 1, we get:

To calculate the hydronium ion concentration in the solution, we use the equation:

pH = 3.89

Putting values in above equation, we get:

Hence, the hydronium ion concentration in the solution is

jjj89t'ji; it hink the answer is your mom is not si

im pretty sure its b