Question detail
Describe the reaction of magnesium with oxygen. What products are formed?
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At a glance
Question
Type
exam_style
Style
Topic
Group 2, the alkaline earth metals
Question
Describe the reaction of magnesium with oxygen. What products are formed?
Answer
When magnesium reacts with oxygen, it forms magnesium oxide (MgO). The reaction is represented by the equation: 2Mg + O2 → 2MgO.
Explanation
This answer is strong because it clearly identifies the reactants and the product of the reaction, demonstrating an understanding of the chemical process involved. The question tests knowledge of the reactivity of Group 2 metals with oxygen.
Common mistake
Misunderstanding Group 2 Metal Reactivity
Students often confuse the reactivity of Group 2 metals with non-metals, thinking they react similarly with oxygen, water, and acids.
To clarify, remember that Group 2 metals react with oxygen to form metal oxides, with water to produce hydroxides and hydrogen gas, and with acids to yield salts and hydrogen gas. For example, the reaction of magnesium with water can be represented as: 1. **Formula**: Mg + 2H2O → Mg(OH)2 + H2 2. **Substitution**: Here, magnesium reacts with water to form magnesium hydroxide and hydrogen gas. 3. **Working**: The magnesium displaces hydrogen from water, resulting in the formation of magnesium hydroxide. 4. **Answer**: The products are magnesium hydroxide (Mg(OH)2) and hydrogen gas (H2). 5. **Units/Conclusion**: This shows that Group 2 metals react with water to produce hydroxides, which is a key characteristic of their reactivity.
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