Discuss the effect (high, low, or no effect) on the calculated percent acetic ac

Question

Discuss the effect (high, low, or no effect) on the calculated percent acetic acid in the vinegar as a result of the following:

1. You added an extra NaOH pellet when making your NaOH solution, so your NaOH was more concentrated than everyone else in the lab.

2. The Erlenmeyer flask used for the titration of the diluted acetic acid was wet with distilled water.

3. The beaker used to obtain the standard HCl was not dry (had some water in it).

4. Five drops of phenolphthalein were used instead of the specified three drops (one drop is 0.05 mL). Assume the phenolphthalein solution is neutral.

5. Extra volume of wash water (distilled) was used in each titration to rinse the sides of the Erlenmeyer titration flask.

Explanation / Answer

1. high effect

2. Low effect

3. high effect

4. no effect

5. no effect

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