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

1 Answer
anor277
Jun 19, 2017

#"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.

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