Question

List three possible sources of error in the experiment of ( Acid-Base Titrations ) which may contribute to error in the final calculation of the molarity of your acid ..
( Please type the answer so I can read it clearly)

Answer 1

Three sources of error in acid-base titration

1. We notice the colour change of the solution due to presence of indicator at the end point (one extra drop from buret added to solution in conical flask after equivalence point) and not at the equivalence point (when number of moles of acid=number of moles of base).

2. Parallax error: When we take the reading of solution in the buret from an angle rather than looking straight at the lower meniscus in colourless solutions and upper meniscus in coloured solutions, this gives an error in the final calculation of the molarity of our acid.

3. Precision of the buret: Some burets may be less precise than others in giving the correct reading. This increases the uncertainty in measurement of volume of titrant used.