a student carried out the experiment but did not follow the directions exacly as written. What effect would the following actions have on the experiment ?

a. The student took a sample of the vinegar with a 5ml voluetric pipet and then emptied all the liqui into an Erlenmeyer flask by blowing out the sample.?

b. Air was not excluded from the buret when it was filled NaOH solution. An initial buret reading was taken then during the titration, the air bubble came out. When the titration reached the end point, a final reading was taken .???

c. The titration went to a purple end point.