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

5. Classification & Balancing of Chemical Reactions

Solubility Rules

GOB Chemistry

5. Classification & Balancing of Chemical Reactions

Solubility Rules

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0:42 minutes

Problem 31d

Textbook Question

Predict whether each of the following ionic compounds is soluble in water: d. CuO

Verified step by step guidance

Step 1: Recall the solubility rules for ionic compounds in water. These rules help predict whether a compound will dissolve in water. For example, compounds containing alkali metal ions (e.g., Na⁺, K⁺) and ammonium ions (NH₄⁺) are generally soluble, as are nitrates (NO₃⁻), acetates (CH₃COO⁻), and most chlorides (Cl⁻), bromides (Br⁻), and iodides (I⁻).

Step 2: Identify the ions present in CuO. Copper(II) oxide consists of Cu²⁺ (copper ion) and O²⁻ (oxide ion).

Step 3: Check the solubility rules for compounds containing oxide ions (O²⁻). Oxides are generally insoluble in water, except for those of alkali metals and some alkaline earth metals (e.g., BaO).

Step 4: Determine if Cu²⁺ is an exception to the general insolubility of oxides. Copper(II) oxide does not fall under the exceptions for oxide solubility, as Cu²⁺ is not an alkali or alkaline earth metal ion.

Step 5: Conclude that CuO is generally insoluble in water based on the solubility rules and the nature of its ions.

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Key Concepts

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

Ionic Compounds

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of positively and negatively charged ions. These compounds typically consist of a metal and a non-metal, and their properties include high melting and boiling points, as well as electrical conductivity when dissolved in water or molten.

Solubility Rules

Solubility rules are guidelines that help predict whether an ionic compound will dissolve in water. These rules take into account the nature of the ions involved, with common soluble compounds including those containing alkali metals, ammonium, and nitrate ions, while many metal oxides, like CuO, are generally insoluble.

Copper(II) Oxide (CuO)

Copper(II) oxide (CuO) is a black solid that is an example of a metal oxide. According to solubility rules, most metal oxides are insoluble in water, which means that CuO does not dissolve in water, making it an important consideration when predicting the solubility of ionic compounds.

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