1. Matter and Measurements4h 29m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 35m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines38m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 46m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

5. Classification & Balancing of Chemical Reactions

Balancing Chemical Equations (Simplified)

GOB Chemistry

5. Classification & Balancing of Chemical Reactions

Balancing Chemical Equations (Simplified)

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3:22 minutes

Problem 27McMurry - 8th Edition

Textbook Question

Which of the following equations are balanced? Balance those that need it. a. CaC₂+2 H₂O→Ca(OH)₂+C₂H₂ b. C₂H₈N₂+2 N₂O₄→2 N₂+2 CO₂+4 H₂O c. 3 MgO +2 Fe→Fe₂O₃+3 Mg d. N₂O→N₂+O₂

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Identify the number of each type of atom on both sides of each equation.

For equation (a), count the atoms: Ca, C, H, and O on both sides. Check if they are equal.

For equation (b), count the atoms: C, H, N, and O on both sides. Check if they are equal.

For equation (c), count the atoms: Mg, O, and Fe on both sides. Check if they are equal.

For equation (d), count the atoms: N and O on both sides. Check if they are equal.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Chemical Equation

A chemical equation represents a chemical reaction using symbols and formulas. It shows the reactants on the left side and the products on the right, indicating the transformation of substances. Understanding how to read and interpret these equations is crucial for determining if they are balanced, meaning the number of atoms for each element is the same on both sides.

Balancing Equations

Balancing chemical equations involves adjusting the coefficients of the reactants and products to ensure that the law of conservation of mass is upheld. This means that the total number of atoms of each element must be equal on both sides of the equation. Techniques such as inspection and the use of algebraic methods can be employed to achieve balance.

Stoichiometry

Stoichiometry is the study of the quantitative relationships between the amounts of reactants and products in a chemical reaction. It allows chemists to predict how much of each substance is needed or produced in a reaction. Understanding stoichiometry is essential for balancing equations, as it provides the necessary framework for calculating the ratios of different substances involved.