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 chemistry, what is a negative control?

A sample that does not contain the acid or base being tested

A buffer solution that maintains a constant pH

A solution with a known pH used to calibrate pH meters

A solution that neutralizes the acid or base in a reaction

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Verified step by step guidance

Understand the concept of a negative control: In scientific experiments, a negative control is a group or sample that does not receive the experimental treatment or condition. It is used to ensure that the experimental results are due to the variable being tested and not some other factor.

Identify the role of a negative control in acid-base chemistry: In the context of acid-base chemistry, a negative control would be a sample that does not contain the acid or base being tested. This helps to confirm that any observed changes in the experiment are due to the presence of the acid or base.

Evaluate the given options: Consider each option and determine if it fits the definition of a negative control. A buffer solution, a solution with a known pH, and a solution that neutralizes the acid or base do not fit the definition of a negative control.

Focus on the correct option: The correct option is 'A sample that does not contain the acid or base being tested' because it aligns with the definition of a negative control by not including the variable being tested.

Conclude the analysis: By understanding the role of a negative control and evaluating the options, you can confidently identify the correct answer in the context of acid-base chemistry.