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.

Question

Chemistry

Zander Sampson

22 September, 13:32

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.

+3

Answers (2)

Know the Answer?

Athena Bullock · Answer 1

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.

Shea · Answer 2

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.