What would be the effect of each of the following sources of error on the molarity of H2SO4 determined in this experiment? State whether the concentration of H2SO4 obtained would be too high or too low. Explain your answer briefly. a. The burette is contaminated with an acid solution.
[1 mark]

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b. The burette contains a large air bubble in the tip, which disappears during the titration [1mark]

c. A small volume of the acid is spilled when you transfer it into the Erlenmeyer flask
[1 mark]