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 be more soluble in acidic solution than in pure water?

BaSO_4

KNO_3

CaCO_3

NaCl

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Verified step by step guidance

Step 1: Understand the concept of solubility and how it can be affected by pH. Some compounds contain anions that can react with H\_3O\^+ (acidic protons), shifting the equilibrium and increasing solubility in acidic solutions.

Step 2: Identify the anions in each compound: BaSO\_4 contains SO\_4\^{2-}, KNO\_3 contains NO\_3\^-, CaCO\_3 contains CO\_3\^{2-}, and NaCl contains Cl\^-.

Step 3: Recognize that carbonate ion (CO\_3\^{2-}) is a base that reacts with acids to form bicarbonate (HCO\_3\^-) or carbonic acid (H\_2CO\_3), which decomposes to CO\_2 and water. This reaction reduces the concentration of CO\_3\^{2-} in solution, shifting the dissolution equilibrium to dissolve more CaCO\_3.

Step 4: Write the dissolution equilibrium for CaCO\_3: $\mathrm{CaCO_3 (s) \rightleftharpoons Ca^{2+} (aq) + CO_3^{2-} (aq)}$ and the acid-base reaction: $\mathrm{CO_3^{2-} + H_3O^+ \rightarrow HCO_3^- + H_2O}$, which consumes carbonate ions and drives more CaCO\_3 to dissolve.

Step 5: Conclude that compounds like BaSO\_4, KNO\_3, and NaCl do not have anions that react significantly with acid, so their solubility is not enhanced in acidic solution, unlike CaCO\_3.