Write a balanced equation for the reaction that occurs when magnesium burns in oxygen. - Leaving Cert Chemistry - Question 1 - 2017
Question 1
Write a balanced equation for the reaction that occurs when magnesium burns in oxygen.
Worked Solution & Example Answer:Write a balanced equation for the reaction that occurs when magnesium burns in oxygen. - Leaving Cert Chemistry - Question 1 - 2017
Step 1
Write the unbalanced equation
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Answer
The reaction of magnesium (Mg) burning in oxygen (O₂) can be initially expressed as:
Mg+O2→MgO
Step 2
Balance the equation
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Answer
To balance the equation, we need to ensure there are equal numbers of magnesium and oxygen atoms on both sides:
Balancing yields:
2Mg+O2→2MgO
This balanced equation shows that two moles of magnesium react with one mole of oxygen to produce two moles of magnesium oxide.
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