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21 January, 21:08

How to balance the chemical equation of Al (S) + CuO (S) >Al2O3 (S) + Cu (S)

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  1. 21 January, 21:29
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    2Al + 3CuO ⟶ Al₂O₃ + 3Cu

    Explanation:

    Al + CuO ⟶ Al₂O₃ + Cu

    1. Put a 1 in front of the most complicated-looking formula (Al₂O₃):

    Al + CuO ⟶ 1Al₂O₃ + Cu

    2. Balance Al:

    We have fixed 2 Al on the right. We need 2 Al on the left. Put a 2 in front of Al.

    2Al + CuO ⟶ 1Al₂O₃ + Cu

    3. Balance O:

    We have fixed 3 O on the right. We need 3 O on the left. Put a 3 in front of CuO.

    2Al + 3CuO ⟶ 1Al₂O₃ + Cu

    4. Balance Cu:

    We have fixed 3 Cu on the right. We need 3 Cu on the right. Put a 3 in front of Cu.

    2Al + 3CuO ⟶ 1Al₂O₃ + 3Cu

    Every formula now has a coefficient. The equation should be balanced.

    5. Check that atoms balance:

    Atom On the left On the right

    Al 2 2

    Cu 3 3

    O 3 3

    The balanced equation is

    2Al + 3CuO ⟶ Al₂O₃ + 3Cu
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