7.2 Oxides (Cambridge (CIE) O Level Chemistry): Flashcards
Exam code: 5070
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What is an amphoteric oxide?
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What is an amphoteric oxide?
An amphoteric oxide is an oxide that reacts with both acids and bases to form a salt and water. The two CIE O Level examples are zinc oxide (ZnO) and aluminium oxide (Al2O3).
Most oxides formed from non-metal elements are ______ oxides.
Most oxides formed from metal elements are ______ oxides.
Most oxides formed from non-metal elements are acidic oxides.
Most oxides formed from metal elements are basic oxides.
Give two examples each of acidic oxides and basic oxides.
Acidic oxide
Basic oxide
Examples of acidic oxides and basic oxides include:
Acidic oxide
Basic oxide
CO2
CuO
SO2
CaO
SO3
Na2O
Non-metal oxides
Metal oxides
An acidic oxide reacts with a ______ to form a salt and water.
A basic oxide reacts with an ______ to form a salt and water.
An acidic oxide reacts with a base to form a salt and water.
A basic oxide reacts with an acid to form a salt and water.
True or False?
Zinc oxide can only react with acids to form a salt and water.
False.
Zinc oxide is an amphoteric oxide. It can react with both acids and bases to produce a salt and water.
The two amphoteric oxides specified at CIE O Level are ______ oxide (ZnO) and ______ oxide (Al2O3).
The two amphoteric oxides specified at CIE O Level are zinc oxide (ZnO) and aluminium oxide (Al2O3).
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