Question

Solution Stoichiometry

1. if a student adds an additional 20 ml of water to the reaction flask during the titration, how does that impact the final results? (low, high, no change) explain.

2. Imagine that you overran the endpoint in a Part 2 titration by 3 drops (20 drops = 1.00ml). How would this affect the resultant molar mass value for this trial? would this trial be considered a reliable trial (agreement within 3% of the other molar mass values)?

3. How is it that titration results can agree within 3% of each other? What is it about the technique of titration that allows for such high precision or reproducibility?

Answer 1

Ans 1) No change in the reading, if any amount of resultant solution is transfered and titrated again. If studendt do this then the reading is low.

Ans 2) If a student add 3 drops more then resultant molar mass for this trial increses. Because concententration of the solution decreses and concentration of solution and molar mass are inversely preportional to each other. Hence this trail should not be considered as relaiable trial.

Ans 3) Titration is always required high precision and reproducibility. So that titration results cannot agree within 3% of each other.