Question

1. Typical precision of a 10-mL pipet is ±0.01 mL (see Exp 1: Measurements and Data Analysis). Assuming there is no other source of error, what is the best precision you can obtain by titration. Comment on your target precision of ±0.15 mL. 2. A 10.0-ml sample of aqueous H2SO4 requires 18.66 ml of 0.206 M NaOH to reach the endpoint. What is the molar concentration of H2SO4? Hint: Write the chemical equation first. 3. The manufacturer of the vinegar used in this experiment claims that the vinegar contains 5% acetic acid by weight. Using your results, molarity of vinegar, and 1.0 g/ml for a density of vinegar, calculate the % acetic acid by weight. Can you tell if what the manufacture claims is reasonable?

          1. Typical precision of a 10-mL pipet is ±0.01 mL (see Exp 1: Measurements and Data Analysis). Assuming there is no other source of error, what is the best precision you can obtain by titration. Comment on your target precision of ±0.15 mL.

2. A 10.0-ml sample of aqueous H2SO4 requires 18.66 ml of 0.206 M NaOH to reach the endpoint. What is the molar concentration of H2SO4? Hint: Write the chemical equation first.

3. The manufacturer of the vinegar used in this experiment claims that the vinegar contains 5% acetic acid by weight. Using your results, molarity of vinegar, and 1.0 g/ml for a density of vinegar, calculate the % acetic acid by weight. Can you tell if what the manufacture claims is reasonable?

1. Typical precision of a 10-mL pipet is ±0.01 mL (see Exp 1: Measurements and Data Analysis). Assuming there is no other source of error, what is the best precision you can obtain by titration. Comment on your target precision of ±0.15 mL.

2. A 10.0-ml sample of aqueous H2SO4 requires 18.66 ml of 0.206 M NaOH to reach the endpoint. What is the molar concentration of H2SO4? Hint: Write the chemical equation first.

3. The manufacturer of the vinegar used in this experiment claims that the vinegar contains 5% acetic acid by weight. Using your results, molarity of vinegar, and 1.0 g/ml for a density of vinegar, calculate the % acetic acid by weight. Can you tell if what the manufacture claims is reasonable?

Added by Jodi H.

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