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 a different solubility with a change in pH?

CaCO_3

KNO_3

BaSO_4

NaCl

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Verified step by step guidance

Step 1: Understand that solubility of a compound can be affected by pH if the compound contains an ion that can react with H\textsuperscript{+} or OH\textsuperscript{−} ions in solution, such as carbonate (CO\textsubscript{3}\textsuperscript{2−}) or sulfate (SO\textsubscript{4}\textsuperscript{2−}).

Step 2: Identify the ions in each compound: CaCO\textsubscript{3} contains Ca\textsuperscript{2+} and CO\textsubscript{3}\textsuperscript{2−}, KNO\textsubscript{3} contains K\textsuperscript{+} and NO\textsubscript{3}\textsuperscript{−}, BaSO\textsubscript{4} contains Ba\textsuperscript{2+} and SO\textsubscript{4}\textsuperscript{2−}, and NaCl contains Na\textsuperscript{+} and Cl\textsuperscript{−}.

Step 3: Recognize that carbonate ions (CO\textsubscript{3}\textsuperscript{2−}) can react with H\textsuperscript{+} ions to form bicarbonate (HCO\textsubscript{3}\textsuperscript{−}) or carbonic acid (H\textsubscript{2}CO\textsubscript{3}), which affects solubility with pH changes.

Step 4: Note that nitrate (NO\textsubscript{3}\textsuperscript{−}), sulfate (SO\textsubscript{4}\textsuperscript{2−}), and chloride (Cl\textsuperscript{−}) ions do not significantly react with H\textsuperscript{+} or OH\textsuperscript{−} ions, so their solubility is generally independent of pH.

Step 5: Conclude that CaCO\textsubscript{3} will have solubility that changes with pH due to the carbonate ion's acid-base chemistry, while KNO\textsubscript{3}, BaSO\textsubscript{4}, and NaCl will not show significant solubility changes with pH.