What happens when: (6) Magnesium burns in the presence of oxygen, then the product dissolves in water؟
إجابة الطالب المختصرة من خلال موقع بوابة الإجابات هي
Magnesium burns with a bright white flame. A white powder (magnesium oxide) is produced.
Here's a breakdown of what happens when magnesium burns in oxygen and then the product dissolves in water:
**1. Magnesium Burns in Oxygen:**
* **Reaction:** Magnesium (Mg) reacts vigorously with oxygen (O₂) in a highly exothermic (heat-releasing) reaction.
* `2Mg(s) + O₂(g) → 2MgO(s)`
* **Observation:** A bright, white light is produced, and white powder forms.
* **Product:** Magnesium oxide (MgO) is the product. It's an ionic compound.
**2. Magnesium Oxide Dissolves in Water:**
* **Reaction:** Magnesium oxide reacts with water (H₂O) in a hydration reaction.
* `MgO(s) + H₂O(l) → Mg(OH)₂(aq)`
* **Observation:** Some of the solid magnesium oxide dissolves in the water. If a universal indicator is added, a blue/purple color will be observed
* **Product:** Magnesium hydroxide (Mg(OH)₂) is produced. While it's not very soluble in water, some of it does dissolve. The dissolved portion creates a basic (alkaline) solution.
**In Summary:**
1. Magnesium burns in oxygen to form magnesium oxide (a white powder).
2. Magnesium oxide reacts with water to form magnesium hydroxide, some of which dissolves. This creates an alkaline solution.
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