Short AnswerTitration TutorialExperiment 1: Perform a Coarse TitrationLab Results

1. For your coarse titration record the following results.

volume of NaOH solution in the burette at the start (mL) 50

volume of NaOH solution in the burette at the end (mL) 37.4

volume of NaOH solution dispensed (mL) 12.26

volume of HCl solution in the flask (mL) 10.00

Data Analysis

1. Calculate the molarity of the HCl concentration using your coarse titration results.

.1226 (check this answer)

Experiment 2: Perform a Fine TitrationLab Results

1. For your fine titration record the following results.

volume of NaOH solution in the burette at the start (mL) 50.00

volume of NaOH solution in the burette at the end (mL) 35.23

volume of NaOH solution dispensed (mL)14.77

volume of HCl solution in the flask (mL) 10.00

Data Analysis

1. Calculate the molarity of the HCl concentration using your fine titration results.

.1477 ( check this answer)

Conclusions

1. What do you expect to happen if you forget to add phenolphthalein to the Erlenmeyer flask?

 

1. Suppose you had to titrate a solution of NaOH of unknown concentration with a solution of HCl of known concentration using phenolphthalein as an indicator. How will you determine the color change?

 

 

1. Suppose you titrated a sample of acetic acid (monoprotic acid) with a 0.125 M solution of NaOH. Given the data in the table below, what is the concentration of the acetic acid solution?

 

1. volume of 0.125 M NaOH dispensed 22.40 mL volume of acetic acid solution used 15.00 mL volume of water added to the HCl solution 15.00 mL