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The length of a stearic acid moleucle can be estimated using the data obtained in this experiment without knowing Avogadro's number. Since the concentration and volume of stearic acid solution used to form the monolayer is known, these numbers can be used along with the density of pure stearic acid (0.94 8/mL) to find the volume of stearic acid molecules present in the monolayer. The thickness of the monolayer can be found by dividing this volume by the area of the monolayer fomrmed (found in your experiment). This thickness corresponds to the length of the stearic acid moleculc. Calculate this length for the trial that produced the best value for Avogadro's number. Then compare this to the "accepted" value for the leangth of this molecule, 2.0 x 10-7 cm, by calculating the percent error.

The length of a stearic acid moleucle can be estimated using the data obtained in this experiment without knowing Avogadro's number. Since the concentration and volume of stearic acid solution used to form the monolayer is known, these numbers can be used along with the density of pure stearic acid (0.94 8/mL) to find the volume of stearic acid molecules present in the monolayer. The thickness of the monolayer can be found by dividing this volume by the area of the monolayer fomrmed (found in your experiment). This thickness corresponds to the length of the stearic acid moleculc. Calculate this length for the trial that produced the best value for Avogadro's number. Then compare this to the "accepted" value for the leangth of this molecule, 2.0 x 10-7 cm, by calculating the percent error.

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter11: Solutions
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Concentration of stearic acid solution: 1.2*10^-4 g/ml Area of single stearic acid molecule: 2.1*10^-15 cm^2
a. dia. of water on glass b. surface area (A) c. number of molecules (#) d. drops: stearic acid sol'n e. mL sol'n for monolayer f. grams stearic acid g. moles of stearic acid h. Avogadro's number Ave. Avogadro's number: 6.4-1023 Trial 2 9.7 cm 73.9 3.5×10 16m² 10 0.13 1.56×16-5 5.5×10-8 6.7×1023 Percent error: Trial 3 numerical estimates of the crror
Transcribed Image Text:a. dia. of water on glass b. surface area (A) c. number of molecules (#) d. drops: stearic acid sol'n e. mL sol'n for monolayer f. grams stearic acid g. moles of stearic acid h. Avogadro's number Ave. Avogadro's number: 6.4-1023 Trial 2 9.7 cm 73.9 3.5×10 16m² 10 0.13 1.56×16-5 5.5×10-8 6.7×1023 Percent error: Trial 3 numerical estimates of the crror
2. The length of a stearic acid moleucle can be estimated using the data obtained in this experiment without knowing Avogadro's number. Since the concentration and volume of stearic acid solution used to form the monolayer is known, these numbers can be used along with the density of pure stearic acid (0.94 %/mL) to find the volume of stearic acid molecules present in the monolayer. The thickness of the monolayer can be found by dividing this volume by the area of the monolayer fomrmed (found in your experiment). This thickness corresponds to the length of the stearic acid moleculc. Calculate this length for the trial that produced the best value for Avogadro's number. Then compare this to the "accepted" value for the leangth of this molecule, 2.0 x 10-7 cm, by calculating the percent error.
Transcribed Image Text:2. The length of a stearic acid moleucle can be estimated using the data obtained in this experiment without knowing Avogadro's number. Since the concentration and volume of stearic acid solution used to form the monolayer is known, these numbers can be used along with the density of pure stearic acid (0.94 %/mL) to find the volume of stearic acid molecules present in the monolayer. The thickness of the monolayer can be found by dividing this volume by the area of the monolayer fomrmed (found in your experiment). This thickness corresponds to the length of the stearic acid moleculc. Calculate this length for the trial that produced the best value for Avogadro's number. Then compare this to the "accepted" value for the leangth of this molecule, 2.0 x 10-7 cm, by calculating the percent error.
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