When heated in a crucible, magnesium metal reacts with oxygen from the air to form magnesium oxide in a synthesis reaction. How do you expect the mass ofthe crucible and its contents to change after the reaction?

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When heated in a crucible, magnesium metal reacts with oxygen from the air to form magnesium oxide in a synthesis reaction. How do you expect the mass ofthe crucible and its contents to change after the reaction?

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Md Ariful Islam · Answer 1 · Apr 02, 2024 09:48:30

We can represent the oxidation so..........

$Mg(s) +1/2O_2(g) stackrel(Delta)rarrMgO(s)$

And thus combustion of one equiv magnesium metal, $24.3*g$, should lead to formation of approx. $40*g$ magnesium oxide. And thus the mass contained by the crucible should almost double.

Often when you do the experiment, you lose some of mass, i.e. the $MgO$ ash is lost from the crucible. Be careful and don't burn yourself on the crucible.

When heated in a crucible, magnesium metal reacts with oxygen from the air to form magnesium oxide in a synthesis reaction. How do you expect the mass ofthe crucible and its contents to change after the reaction?

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