Compute the ph of the solution at the half equivalence point

Reference no: EM13196152

Abby was given a 50mL sample of .33M solution of HF. After preparing a buret she tranferred 20 mL of the weak acid into a 100mL beaker. She then titrated this with a standardized solution of .11 M NaOH.

a. How many moles of the weak acid were added to the beaker?

b. How many moles of NaOH are required to neutralize the sample of weak acid?

c. how many mililiters of the NaOH are required to neutralize the sample of weak acid?

d. How many moles of NaOH have been added at one half of the volume in part 'c' (volume at half equivalence point)?

e. How many moles of the weak acid have reacted at the half equivalence point?

f. Calculate the pH of the solution at the half equivalence point.

g. Explain how the pH at the half equivalence point is related to Ka for the weak acid.

Reference no: EM13196152

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