Question

How do these potential error sources affect the molarity of acetic acid in the titration lab?

Answer 1

`"1. No effect; 2. Low; 3. No effect; 4. High; 5. No effect......"`

Explanation:

`1.` Often you add a little to distilled water to your flask during the titration to swill the sides; the presence of a bit of water does not affect the acid/base reagent present.

`2.` I presume that there was extra `HOAc` in the flask, the titre (of `NaOH`) will be high.

`3.` No effect, I would have added 3-4 drops anyway.....because phenolphthalein is colourless at low pH, often you forget you've added indicator already, and give it another dose, to be sure, to be sure.

`4.` You have not accounted for the extra titrant, concentration will be high.

`5.` There should be no effect.