Classify oxides and apply salt solubility rules.
| English | Chinese |
|---|---|
| basic oxide | 碱性氧化物 |
| acidic oxide | 酸性氧化物 |
| amphoteric | 两性 |
| precipitate | 沉淀 |
Try each question before opening its hint or answer. Use paper for calculations and diagrams.
Why cannot “all metal oxides are basic” be a complete classification?
Apply all-soluble ion rules before the exceptions for a salt family.
Some metal oxides, including Al₂O₃ and ZnO, are amphoteric.
Give two amphoteric oxides.
Think of oxides that react with both acids and bases.
Al₂O₃ and ZnO.
Predict solubility of NaNO₃, BaSO₄ and MgCO₃. Give a reason for each.
Use the nitrate rule, sulfate exceptions and carbonate rule.
NaNO₃: soluble, nitrate/sodium salt. BaSO₄: insoluble sulfate exception. MgCO₃: insoluble carbonate.
Use Lesson 3 in your worksheet for written practice. Your teacher will discuss those answers in class.