Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

6. Chemical Quantities & Aqueous Reactions

Solubility Rules

General Chemistry

6. Chemical Quantities & Aqueous Reactions

Solubility Rules

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Multiple Choice

Which of the following compounds will have increased solubility in water as the acidity of the solution increases?

MgSO4

KNO3

NaCl

CaCO3

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Verified step by step guidance

Understand that solubility changes with acidity when the compound contains an ion that can react with H\_3O\^+ (or H\^+). This often applies to salts containing basic anions like carbonate (CO\_3\^{2-}).

Identify the ions in each compound: MgSO\_4 dissociates into Mg\^{2+} and SO\_4\^{2-}, KNO\_3 into K\^+ and NO\_3\^-, NaCl into Na\^+ and Cl\^-, and CaCO\_3 into Ca\^{2+} and CO\_3\^{2-}.

Recognize that SO\_4\^{2-}, NO\_3\^-, and Cl\^- are conjugate bases of strong acids (H\_2SO\_4, HNO\_3, and HCl respectively) and do not react significantly with H\^+, so their solubility is not strongly affected by acidity.

Note that CO\_3\^{2-} is a base that can react with H\^+ to form HCO\_3\^- and eventually H\_2CO\_3 (carbonic acid), which decomposes to CO\_2 and H\_2O. This reaction removes CO\_3\^{2-} from solution, shifting equilibrium and increasing solubility of CaCO\_3 as acidity increases.

Conclude that CaCO\_3 will have increased solubility in acidic solutions due to the reaction of carbonate ions with H\^+, while the other salts will not show this behavior.