A buffer solution is 0.413 M in HF and 0.237 M in KF. If Ka for HF is 7.2×10-4, what is the pH of this buffer solution?

2.90

Explanation:

Any buffer system can be described with the reaction:

Where is the acid and is the base. Additionally, the calculation of the pH of any buffer system can be made with the Henderson-Hasselbach equation:

With all this in mind, we can write the reaction for our buffer system:

In this case, the acid is with a concentration of 0.413 M and the base is with a concentration of 0.237 M. We can calculate the pKa value if we do the "-Log Ka", so:

Now, we can plug the values into the Henderson-Hasselbach

The pH value would be 2.90

I hope it helps!

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.