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

Previous problemNext problem

Struggling with General Chemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Identify the correct balanced equation and net ionic equation for the reaction between aqueous hydrochloric acid and aqueous sodium carbonate.

HCl (aq) + Na2CO3 (aq) → NaCl (aq) + H2O (l) + CO2 (g); Net ionic equation: CO3^2- (aq) + 2 H^+ (aq) → H2O (l) + CO2 (g)

2 HCl (aq) + Na2CO3 (aq) → NaCl (aq) + 2 H2O (l) + CO2 (g); Net ionic equation: CO3^2- (aq) + 2 H^+ (aq) → 2 H2O (l) + CO2 (g)

HCl (aq) + Na2CO3 (aq) → NaCl (aq) + H2O (l) + CO2 (g); Net ionic equation: CO3^2- (aq) + H^+ (aq) → H2O (l) + CO2 (g)

2 HCl (aq) + Na2CO3 (aq) → 2 NaCl (aq) + H2O (l) + CO2 (g); Net ionic equation: CO3^2- (aq) + 2 H^+ (aq) → H2O (l) + CO2 (g)

Previous problemNext problem

Verified step by step guidance

Identify the reactants and products in the given chemical reaction: Hydrochloric acid (HCl) and sodium carbonate (Na2CO3) are the reactants, while sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2) are the products.

Write the unbalanced chemical equation: HCl (aq) + Na2CO3 (aq) → NaCl (aq) + H2O (l) + CO2 (g).

Balance the chemical equation by ensuring the number of atoms of each element is the same on both sides. Start by balancing the sodium (Na) atoms: 2 HCl (aq) + Na2CO3 (aq) → 2 NaCl (aq) + H2O (l) + CO2 (g).

Next, balance the hydrogen (H) and chlorine (Cl) atoms. Since there are 2 HCl molecules, the equation is already balanced for H and Cl: 2 HCl (aq) + Na2CO3 (aq) → 2 NaCl (aq) + H2O (l) + CO2 (g).

Write the net ionic equation by removing the spectator ions (Na^+ and Cl^-). The net ionic equation focuses on the species that undergo a chemical change: CO3^2- (aq) + 2 H^+ (aq) → H2O (l) + CO2 (g).