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

Which of the following is the balanced chemical equation for the reaction of sulfurous acid (H2SO3) with lithium hydroxide (LiOH) to form water (H2O) and lithium sulfite (Li2SO3)?

H2SO3 + LiOH → H2O + Li2SO3

H2SO3 + 2LiOH → 2H2O + Li2SO3

H2SO3 + LiOH → 2H2O + Li2SO3

2H2SO3 + LiOH → H2O + 2Li2SO3

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Verified step by step guidance

Identify the reactants and products in the chemical reaction. The reactants are sulfurous acid (H2SO3) and lithium hydroxide (LiOH), and the products are water (H2O) and lithium sulfite (Li2SO3).

Write the unbalanced chemical equation: H2SO3 + LiOH → H2O + Li2SO3.

Balance the equation by ensuring the number of atoms of each element is the same on both sides. Start with the lithium (Li) atoms. Since there are two lithium atoms in Li2SO3, you need two LiOH molecules on the reactant side: H2SO3 + 2LiOH → H2O + Li2SO3.

Next, balance the hydrogen (H) atoms. There are four hydrogen atoms on the reactant side (2 from H2SO3 and 2 from 2LiOH), so you need two water molecules on the product side: H2SO3 + 2LiOH → 2H2O + Li2SO3.

Finally, check that the number of sulfur (S) and oxygen (O) atoms are balanced. There is one sulfur atom and three oxygen atoms in both H2SO3 and Li2SO3, and the oxygen atoms are balanced with the two water molecules. The balanced equation is: H2SO3 + 2LiOH → 2H2O + Li2SO3.