Chemistry Lab Report

Experiment Title:  STANDARDIZATION OF A BASE  AND TITRATION OF A VINEGAR SOLUTION

This question is just an analysis of what happened during the experiment. I will upload the lab manual and the lab report. What I need is answer for the lab questions on the last two pages of the manual (page no. 11-12). 

Page 11 is basically what I have done in the report except that I'm not sure that I did the right calculation for part B.