Calculate the ph of a buffer that is 0.158 m hclo and 0.099 m naclo. the ka for hclo is 2.9 10-8
Answers
The given buffer solution is consists of HClO and NaClO. The HClO is our weak acid component for the given buffer while the NaClO is our conjugate base component. It is important to identify the weak acid and conjugate base component because we will use the Henderson-Hasselbalch equation to calculate the pH of the buffer solution. The equation requires the concentration of the weak acid and the conjugate base of the buffer solution.
Answer and Explanation:
We need to calculate first the pKa value of the buffer solution.
pKa=−log(Ka)
pKa=−log(2.9×10−8)
pKa=7.54
We can now use the Henderson-Hasselbalch equation to determine the pH value of the HClO-NaClO buffer solution.
pH=pKa+log([conjugatebase / weakacid])
pH=7.54+log([0.099M / 0.158M])
pH=7.34
conclusion :-
The pH of the solution is equal to 7.34.