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

Arrhenius Acid and Base

GOB Chemistry

10. Acids and Bases

Arrhenius Acid and Base

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Multiple Choice

Which ions are formed from the dissociation of the following compound?

Sr(OH)₂ (s) → Sr²⁺ (aq) + 2 OH^-

Sr(OH)₂ (s) → Sr²⁺ (aq) + OH^-

Sr(OH)₂ (s) → 2 Sr⁺ (aq) + OH^-

Sr(OH)₂ (s) → 2 Sr⁺ (aq) + 2 OH^-

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Verified step by step guidance

Identify the compound given in the problem: Sr(OH)2. This is strontium hydroxide, a common ionic compound.

Understand the concept of dissociation: Dissociation is the process by which an ionic compound separates into its individual ions when dissolved in water.

Determine the ions that make up Sr(OH)2: Strontium hydroxide consists of strontium ions (Sr) and hydroxide ions (OH).

Write the dissociation equation: When Sr(OH)2 dissociates, it forms Sr2+ ions and OH- ions. The balanced equation is: Sr(OH)2 (s) → Sr2+ (aq) + 2 OH- (aq).

Verify the charge balance: Ensure that the total charge on the left side of the equation equals the total charge on the right side. Sr2+ has a +2 charge and each OH- has a -1 charge, so two OH- ions balance the +2 charge of Sr2+.