Asked Mar 28, 2019

After 25.5 mL of 0.05 M NaOH has been added to 50mL of 0.1 M HF, what is the pH of the solution? (Ka (HF)=7.2*10-4)


Expert Answer

Step 1

pKa of the buffer solution has to be determined for calculating the pH of the solution.

Step 2

Number of moles of HF and NaOH was determined using the formula for molarity.

Step 3

Volume of NaOH is 25.5mL whereas the volume of HF is 50mL. It implies that HF is in excess and pH depends on the excess moles of HF. Here...


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