CHEM 200 Lecture Notes - Lecture 13: Lab Notebook, Graduated Cylinder, Molar Mass
Document Summary
Refer to the pre-lab on page 18 in my laboratory notebook to see a generalized outline of the procedure to be followed. In the experiment, these changes were made: we did not use pipets during this lab and we measured 25 ml using a graduated cylinder. Balanced equation : 3naoh (aq) + h c h o (aq) na c h o (aq) + 3h o (l) For this experiment, we titrated a citric acid solution with our naoh solution and then used our data to calculate the molar mass of the acid. We measured out citric acid, added di water to it, three drops of phenolphthalein, and then titrated it with the naoh solution. In the manual, we were instructed to measure out around 0. 160 grams of citric acid. My three values of 0. 161g, 0. 162g, and 0. 164g were both accurate and precise because they were very close to each other and the value that we were instructed to be near.
