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

3. Chemical Reactions

Balancing Chemical Equations

General Chemistry

3. Chemical Reactions

Balancing Chemical Equations

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Multiple Choice

What are the balanced coefficients for the reaction: Na3PO4(aq) + AlCl3(aq) → NaCl(aq) + AlPO4(s)?

1, 2, 3, 1

1, 1, 3, 1

3, 2, 1, 3

2, 1, 3, 2

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Verified step by step guidance

Write down the unbalanced chemical equation: Na3PO4(aq) + AlCl3(aq) → NaCl(aq) + AlPO4(s).

Identify the number of atoms of each element in the reactants and products. For example, count the number of Na, P, O, Al, and Cl atoms on both sides of the equation.

Start by balancing the elements that appear in only one compound on each side. In this case, balance the aluminum (Al) atoms first. Since there is one Al atom in AlCl3 and one in AlPO4, they are already balanced.

Next, balance the sodium (Na) atoms. There are 3 Na atoms in Na3PO4, so you need 3 NaCl molecules to balance the Na atoms. Adjust the coefficient of NaCl to 3.

Finally, balance the chlorine (Cl) atoms. Since you have 3 NaCl molecules, you need 3 Cl atoms, which means you need 1.5 AlCl3 molecules. However, coefficients must be whole numbers, so adjust the coefficients to 2 Na3PO4, 1 AlCl3, 3 NaCl, and 2 AlPO4 to balance the equation.