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

Molecular Equations

General Chemistry

6. Chemical Quantities & Aqueous Reactions

Molecular Equations

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Multiple Choice

What is the molecular equation for the precipitation reaction that occurs when lithium sulfate and lead(II) acetate solutions are mixed?

Li2SO4(aq) + Pb(C2H3O2)2(aq) → PbSO4(s) + 2LiC2H3O2(aq)

Li2SO4(aq) + Pb(C2H3O2)2(aq) → NO REACTION

Li2SO4(aq) + Pb(C2H3O2)2(aq) → 2LiPb(aq) + SO4(C2H3O2)2(s)

Li2SO4(aq) + Pb(C2H3O2)2(aq) → Li2Pb(aq) + SO4(C2H3O2)2(s)

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Verified step by step guidance

Identify the reactants in the given problem: lithium sulfate (Li2SO4) and lead(II) acetate (Pb(C2H3O2)2). Both are aqueous solutions, denoted as (aq).

Determine the possible products of the reaction. In a precipitation reaction, ions from the reactants combine to form an insoluble compound. Here, lead(II) ions (Pb^2+) can combine with sulfate ions (SO4^2-) to form lead(II) sulfate (PbSO4), which is insoluble in water and will precipitate out as a solid, denoted as (s).

Write the molecular equation for the reaction. Combine the reactants and products, ensuring the equation is balanced. The balanced equation is: Li2SO4(aq) + Pb(C2H3O2)2(aq) → PbSO4(s) + 2LiC2H3O2(aq).

Verify the solubility of the products. Lead(II) sulfate (PbSO4) is insoluble, confirming it as the precipitate. Lithium acetate (LiC2H3O2) remains soluble in water, denoted as (aq).

Ensure the equation is balanced in terms of atoms and charge. Check that the number of each type of atom is the same on both sides of the equation, and that the charges are balanced.