3. Solutions from the Erlenmeyer flasks may be poured down the sink 4. Wipe up your work area. 5. Wipe off and return the safety goggles to the cabinet (or place it in your drawer if it belongs to you). Note that once you put away your safety goggles, you must leave the lab. Remember to wash your hands before leaving. Pre-Lab Exercises 1. If 2.50 mL of vinegar requires 34.90 mL of 0.0960 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in 500.0 mL of this vinegar? [density of vinegar = 1.01 g mL] 2. Calculate the mass % of acetic acid in the vinegar in the previous exercise (question#1 above). Assume that the density of the vinegar is 1.01 g mL. 3. If phenolphthalein is used as indicator, what color will the solution be at the endpoint? In your reading, it talks about errors that are possible when doing titrations, what are three of those possible sources of error? 4. Post-Lab Questions 1. What would happen if you forgot to add phenolphthalein indicator solution to the vinegar in step 3? Explain using full sentences. if theoretical molarity of HC2H3O2 is 0.975 M. Show

3. Solutions from the Erlenmeyer flasks may be poured down the sink 4. Wipe up your work area. 5. Wipe off and return the safety goggles to the cabinet (or place it in your drawer if it belongs to you). Note that once you put away your safety goggles, you must leave the lab. Remember to wash your hands before leaving. Pre-Lab Exercises 1. If 2.50 mL of vinegar requires 34.90 mL of 0.0960 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in 500.0 mL of this vinegar? [density of vinegar = 1.01 g mL] 2. Calculate the mass % of acetic acid in the vinegar in the previous exercise (question#1 above). Assume that the density of the vinegar is 1.01 g mL. 3. If phenolphthalein is used as indicator, what color will the solution be at the endpoint? In your reading, it talks about errors that are possible when doing titrations, what are three of those possible sources of error? 4. Post-Lab Questions 1. What would happen if you forgot to add phenolphthalein indicator solution to the vinegar in step 3? Explain using full sentences. if theoretical molarity of HC2H3O2 is 0.975 M. Show

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter84: Fractional Distillation, Azeotropes

Section: Chapter Questions

Problem 6P

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