Determine which solution, buffered or unbuffered reacted with more moles of NaOH when the equivalence point was reached?

THE BUFFER IN LEMONADE

In this experiment, you will titrate the two solutions (buffered and unbuffered solution) of citric
acid with 0.10 M NaOH , monitoring pH using pH Sensor and plot titration curves as pH versus
volume of the titrant NaOH.

Discussion hints

1. Determine which solution, buffered or unbuffered reacted with more moles of NaOH when the
equivalence point was reached?
2. Observe the graph of each titration. How does the titration curve of the buffered lemonade
compare to the curve of the unbuffered citric acid solution?
3. What is the formula of citric acid and the sodium salt of citric acid?