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

In the context of acid-base reactions, how is a controlled variable different from a responding variable?

A controlled variable is the pH level, while a responding variable is the concentration of the acid.

A controlled variable is the one that changes in response to the experiment, while a responding variable is kept constant.

A controlled variable is the concentration of the base, while a responding variable is the temperature.

A controlled variable is kept constant to ensure a fair test, while a responding variable is the one that changes as a result of the experiment.

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Verified step by step guidance

Understand the definitions: A controlled variable is a factor that is kept constant throughout an experiment to ensure that any changes in the responding variable are due to the manipulation of the independent variable.

Identify the responding variable: This is the variable that is observed and measured in the experiment. It changes in response to the independent variable.

Differentiate between the two: In an experiment, the controlled variable is not allowed to change, while the responding variable is expected to change as a result of the experiment.

Apply to acid-base reactions: In the context of acid-base reactions, a controlled variable could be the concentration of a reactant that is kept constant, while the responding variable could be the pH level that changes as the reaction proceeds.

Summarize the correct answer: A controlled variable is kept constant to ensure a fair test, while a responding variable is the one that changes as a result of the experiment.