Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

3. Acids and Bases

Acids and Bases

Organic Chemistry

3. Acids and Bases

Acids and Bases

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Multiple Choice

Which of the following statements best explains why a strong acid completely dissociates in water?

Strong acids are highly soluble in water, which leads to complete dissociation.

Strong acids have a high concentration of hydrogen ions.

Strong acids have a high molecular weight, which facilitates dissociation.

Strong acids have a low pKa value, indicating a high tendency to donate protons.

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Verified step by step guidance

Understand the concept of acid dissociation: In aqueous solutions, acids dissociate to release hydrogen ions (H⁺). The extent of this dissociation is a key factor in determining the strength of an acid.

Define strong acids: Strong acids are those that completely dissociate in water, meaning they release all their hydrogen ions into the solution.

Explore the role of pKa: The pKa value of an acid is a measure of its acidity. A low pKa value indicates a strong acid, as it suggests a high tendency to donate protons (H⁺ ions).

Analyze the given options: Evaluate each statement based on the definition and characteristics of strong acids. Consider the relationship between pKa and acid strength.

Conclude with the correct explanation: The statement 'Strong acids have a low pKa value, indicating a high tendency to donate protons' best explains why strong acids completely dissociate in water, as it directly relates to their ability to release hydrogen ions.