CHEMISTRY 1B POTENTIOMETRIC TITRATIONS SOLID ACID UNKNOWNS This is an alternative experiment to part IV of Experiment 5, Potentiometric Titrations . You will receive from Mrs. Huber a solid acid sample. Your acid is one of the acids listed on the back of this page. To identify your acid you will need to titrate it with NaOH and plot a titration curve. From the information contained in the titration curve you will be able to see how many endpoints there are, calculate the molecular weight of your acid, and calculate K a values. Now that you have already done several titrations, you should be able to come up with your own procedure for this titration. Here are some things to keep in mind: • Do not use the entire sample I give you! If you assume an average molecular weight of 130 g/mol, you can calculate an approximate weight of sample to use in the titration so that the first equivalence point will occur at about 15 mL of base added. It is not important to use precisely this amount, but it is important to know the precise amount you actually use.
You've reached the end of your free preview.
Want to read both pages?
- Summer '19
- Potentiometric Titrations