Question

Choose the correct coefficients for the following reaction:

Answer 1

Hey there!

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + H₂O

Balance O. (not including SO₄)

2 on the left, 1 on the right. Add a coefficient of 2 in front of H₂O.

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + 2H₂O

Balance H.

4 on the left, 4 on the right. Already balanced.

Balance SO₄. (polyatomic ion)

1 on the left, 1 on the right. Already balanced.

Balance Mg.

1 on the left, 1 on the right. Already balanced.  

Our final balanced equation:

Mg(OH)₂ + H₂(SO₄) → Mg(SO₄) + 2H₂O

So your answer is a. 1, 1, 1, 2.

Hope this helps!