Natural Indicator Pre-lab     Chemistry 425

Please submit your prelab assignment to me via e-mail at least 30 minutes prior to lab.  For your own records (or in case, heaven forbid, the transmission does not work) bring a hard copy with you to lab.

Read sections 12-2, 12-4, 12-5, and 12-6 in your book for preparation for this experiment.

Name:

Question #1 Look up the definition of end point and equivalence point of a titration in your textbook or elsewhere. Define both in your notebook. How much bias will be introduced in this experiment by measuring the end point with the indicators and the equivalence point with pH meters?

Question #2 Write down the procedure for the standardization of NaOH with KHP.

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