Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.
Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.
Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Question
Calculate the mass % of naphthalene(C10H8) in 50.0g of methanol to obtain a vapor pressure of 118 mmHg. The vapor pressure of methanol, at 298K, is 123.8 mmHg.
Expert Solution
Step 1
Given:
The solute is naphthalene(C10H8) and the solvent is methanol(CH3OH).
The pure vapor pressure of methanol, at 298K, = 123.8 mmHg.
The molar mass of methanol, (M1) = 32 g/mol.
The molar mass of naphthalene, (M2) = 128.17 g/mol.
The given mass of methanol, (m1) = 50 g.
The partial vapor pressure of the methanol, = 118 mmHg.
To calculate:
The mass % of naphthalene
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