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Calculate the surface adsorption I' for a 0.100M solution of caproic acid. Give your answer in SI units. Assume T=298K.

Calculate the surface adsorption I' for a 0.100M solution of caproic acid. Give your answer in SI units. Assume T=298K.

Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
11th Edition
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Chapter6: Solutions And Colloids
Section: Chapter Questions
Problem 6.111P: 6-111 As noted in Section 6-8C, the amount of external pressure that must be applied to a more...
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I need help on part B. 

Surfactants are amphilic molecules (i.e. part polar and part non-polar). When dissolved water a certain fraction of the amphilic molecules form a surface monolayer, where the polar part of the molecule is directed inward toward the water and the nonpolar part of the molecule is directed outward away from the water. Surfactants have the effect of lowering the surface tension of the solution. Fatty acids are organic acids composed of acpolar carboxyl head group and a nonpolr aliphatic chain. If a solution of a fatty acid has a bulk concentration of c₂ the surfact tension of this solution is related to the surface tension f pure water yo by yo y = ax ln(1 + bx c₂) where a and b are constants. ▼ Part A For the fatty acid caproic acid the constants a and b are a = 0.0130 and b= 232.7. Calculate the surface tension of a 0.100M solution of caproic acid. Assume at T=298K the surface tension of pure water is = 0.07199. Give your answer in SI units. 7 = 3.05x10-2 N m Submit Previous Answers ✓ Correct Part B Calculate the surface adsorption I' for a 0.100M solution of caproic acid. Give your answer i SI units. Assume T-298K. r = Submit ——| ΑΣΦ Request Answer mor m²
Transcribed Image Text:Surfactants are amphilic molecules (i.e. part polar and part non-polar). When dissolved water a certain fraction of the amphilic molecules form a surface monolayer, where the polar part of the molecule is directed inward toward the water and the nonpolar part of the molecule is directed outward away from the water. Surfactants have the effect of lowering the surface tension of the solution. Fatty acids are organic acids composed of acpolar carboxyl head group and a nonpolr aliphatic chain. If a solution of a fatty acid has a bulk concentration of c₂ the surfact tension of this solution is related to the surface tension f pure water yo by yo y = ax ln(1 + bx c₂) where a and b are constants. ▼ Part A For the fatty acid caproic acid the constants a and b are a = 0.0130 and b= 232.7. Calculate the surface tension of a 0.100M solution of caproic acid. Assume at T=298K the surface tension of pure water is = 0.07199. Give your answer in SI units. 7 = 3.05x10-2 N m Submit Previous Answers ✓ Correct Part B Calculate the surface adsorption I' for a 0.100M solution of caproic acid. Give your answer i SI units. Assume T-298K. r = Submit ——| ΑΣΦ Request Answer mor m²
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