Table of contents

1. The Chemical World9m
- The Scientific Method
  9m
2. Measurement and Problem Solving2h 19m
3. Matter and Energy2h 15m
4. Atoms and Elements2h 33m
5. Molecules and Compounds1h 50m
6. Chemical Composition1h 23m
7. Chemical Reactions1h 43m
8. Quantities in Chemical Reactions1h 8m
9. Electrons in Atoms and the Periodic Table2h 32m
10. Chemical Bonding2h 10m
11 Gases2h 7m
12. Liquids, Solids, and Intermolecular Forces1h 11m
13. Solutions3h 1m
14. Acids and Bases2h 14m
15. Chemical Equilibrium1h 27m
16. Oxidation and Reduction1h 33m
17. Radioactivity and Nuclear Chemistry53m

7. Chemical Reactions

Solubility Rules

Introduction to Chemistry

7. Chemical Reactions

Solubility Rules

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Multiple Choice

Which pair of compounds is insoluble in water?

PbSO₄ and Pb₃(PO₄)₂

Na₂S and CuS

(NH₄)₂SO₄ and AgI

AgNO₃ and KNO₃

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Verified step by step guidance

Step 1: Understand the concept of solubility rules. Solubility rules help predict whether a compound will dissolve in water. Compounds containing alkali metal ions (like Na+, K+) and ammonium ion (NH4+) are generally soluble.

Step 2: Identify the ions in each compound. For example, PbSO4 contains Pb2+ and SO4^2-, Na2S contains Na+ and S^2-, and so on.

Step 3: Apply the solubility rules to each compound. For instance, sulfates (SO4^2-) are generally soluble, but there are exceptions like PbSO4, which is insoluble.

Step 4: Consider the exceptions to the solubility rules. Lead (II) sulfate (PbSO4) and lead (II) phosphate (Pb3(PO4)2) are known to be insoluble in water.

Step 5: Compare the solubility of each pair of compounds. Based on the solubility rules and exceptions, determine which pair contains compounds that are both insoluble in water.