Table of contents

1. Matter and Measurements4h 31m
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 27m
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. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
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

10. Acids and Bases

Acid-Base Reactions

GOB Chemistry

10. Acids and Bases

Acid-Base Reactions

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4: minutes

Problem 46b

Textbook Question

Complete and balance the equation for each of the following reactions:
b. Ca(s) + H₂SO₄(aq) →

Verified step by step guidance

Identify the type of reaction: This is a single replacement reaction where calcium (Ca) reacts with sulfuric acid (H₂SO₄) to produce hydrogen gas (H₂) and a salt, calcium sulfate (CaSO₄).

Write the unbalanced equation: Ca(s) + H₂SO₄(aq) → H₂(g) + CaSO₄(aq).

Balance the equation by ensuring the number of atoms of each element is the same on both sides. Start with calcium (Ca), which is already balanced with one atom on each side.

Next, balance the hydrogen (H) atoms. There are 2 hydrogen atoms in H₂SO₄ on the reactant side and 2 hydrogen atoms in H₂ on the product side, so hydrogen is already balanced.

Finally, check the sulfate ion (SO₄²⁻). There is one sulfate ion on both sides of the equation, so it is balanced. The final balanced equation is: Ca(s) + H₂SO₄(aq) → H₂(g) + CaSO₄(aq).

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Key Concepts

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

Balancing Chemical Equations

Balancing chemical equations involves ensuring that the number of atoms for each element is the same on both sides of the equation. This is based on the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. To balance an equation, coefficients are adjusted in front of the chemical formulas to achieve equal atom counts.

Reactants and Products

In a chemical reaction, reactants are the starting substances that undergo a change, while products are the substances formed as a result of the reaction. In the given equation, calcium (Ca) and sulfuric acid (H₂SO₄) are the reactants, and the products will depend on the reaction type. Understanding the nature of reactants and products is crucial for predicting the outcome of the reaction.

Types of Reactions

Chemical reactions can be classified into several types, including synthesis, decomposition, single replacement, and double replacement. The reaction between calcium and sulfuric acid is a single replacement reaction, where calcium displaces hydrogen in sulfuric acid, forming calcium sulfate and hydrogen gas. Recognizing the type of reaction helps in predicting the products and balancing the equation.