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 pair of compounds is likely to have similar solubilities in water at 40°C?

BaSO4 and Na2SO4

AgCl and NaNO3

PbCl2 and NaCl

NaCl and KCl

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Verified step by step guidance

Step 1: Understand that solubility in water depends on the nature of the compound, including its ionic character, lattice energy, and hydration energy. Compounds with similar ionic charges and sizes often have similar solubilities.

Step 2: Analyze the given pairs by comparing their ions. For example, BaSO4 and Na2SO4 both contain sulfate ions (SO4^2-), but Ba^2+ and Na^+ differ significantly in charge and size, affecting solubility.

Step 3: Consider the solubility rules: NaNO3 and KCl are generally very soluble in water because they contain alkali metal ions (Na^+, K^+) and nitrate or chloride ions, which are highly soluble.

Step 4: Compare PbCl2 and NaCl. PbCl2 is only moderately soluble due to the Pb^2+ ion, while NaCl is highly soluble. This difference in cation charge and lattice energy affects solubility.

Step 5: Recognize that NaCl and KCl both contain monovalent cations (Na^+ and K^+) and the same anion (Cl^-), making their lattice energies and hydration energies similar, which leads to similar solubilities in water at 40°C.