Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

23. Lipids

Fatty Acids

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Multiple Choice

Which of the following fatty acids would you expect to be more soluble in cyclohexane?

Palmitic acid (16 Cs)

Stearic acid (18 Cs)

Lauric acid (12 Cs)

none of the above

Next problem

Verified step by step guidance

Understand the solubility principle: Solubility of a substance in a solvent depends on the similarity of their intermolecular forces. Cyclohexane is a non-polar solvent, so non-polar substances are more soluble in it.

Identify the nature of fatty acids: Fatty acids have a hydrophobic hydrocarbon chain and a hydrophilic carboxylic acid group. The longer the hydrocarbon chain, the more non-polar the fatty acid becomes.

Compare the fatty acids: Lauric acid has 12 carbon atoms, Palmitic acid has 16 carbon atoms, and Stearic acid has 18 carbon atoms. The longer the carbon chain, the more non-polar the fatty acid.

Determine solubility in cyclohexane: Since cyclohexane is non-polar, the fatty acid with the longest hydrocarbon chain (Stearic acid) will be more soluble due to its increased non-polar character.

Conclude: Stearic acid, with 18 carbon atoms, is expected to be more soluble in cyclohexane compared to Lauric acid and Palmitic acid, due to its longer non-polar hydrocarbon chain.