A student titrates 50 mL of apple juice and reports the following in the titration to the phenolphthalein end? A student titrates 50 mL of apple juice and reports the following in the titration to the phenolphthalein end point with .1011 M NaOH.
Final buret reading- 17.86 mL
Initial buret reading- 1.98 mL
A) What is the concentration of the total available acide in moles/L of the apple juice?
B) Assuming a drop is .05 mL, what will be the percentage error introduced into the result if the final buret reading is two drops past the actual endpoint?
C) What is the percentage error in the result if the true volume of the juice titrated was 51 mL?
D) If the measured pH of the pure apple juice is 4.0, what is the apparent Ka of the acid?