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8 January, 07:31

An unbalanced chemical equation is shown: 2CaO + 2H2O → Ca (OH) 2

Which of the following statements explains why the equation is not balanced?

Four molecules of Ca (OH) 2 should be produced during the decomposition reaction.

Two molecules of Ca (OH) 2 should be produced during the decomposition reaction.

Four molecules of Ca (OH) 2 should be produced during the synthesis reaction.

Two molecules of Ca (OH) 2 should be produced during the synthesis reaction.

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Answers (2)
  1. 8 January, 07:44
    0
    There are 2 Ca, 4 H (2*2) and 4 O (2+2) on the left hand side. So there should be the same number of atoms 2Ca and 4 (O+H) on the right hand side. The reaction is a synthesis (making something new), rather than a decomposition (destroying something).

    The answer is Two molecules of Ca (OH) 2 should be produced during the synthesis reaction.
  2. 8 January, 07:47
    0
    balancing the eqn: 2CaO + 2H2O → 2Ca (OH) 2

    so two Ca (OH) 2 are produced.

    two things combine to form a single compound so its synthesis reaction.

    ans is Two molecules of Ca (OH) 2 should be produced during the synthesis reaction.
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