Which of the following combinations of reactants will result in a synthesis reaction?A. Li + HCl B. Al + O2 C. Ca + H2O D. F2 + HCl

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hurKarahmsm hurKarahmsm

14-09-2016
Chemistry

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Which of the following combinations of reactants will result in a synthesis reaction?A. Li + HCl B. Al + O2 C. Ca + H2O D. F2 + HCl

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JcAlmighty JcAlmighty · Answer 1 · 2016-09-17T15:31:34+02:00

The answer is B. Al + O2.

In a synthetic reaction, two (or more) compounds combine and form one complex product. It can be expressed as:
A + B → AB

So, let's go through all of the reactions:
A. 2Li + 2HCl → 2LiCl + H₂
B. 4Al + 3O₂ → 2Al₂O₃
C. Ca + 2H₂O → Ca(OH)₂ + H₂
D. F₂ + 2HCl → 2HF + Cl₂

So, in all of these reactions, there are two products except in the choice B, where only one product. So, the example of synthesis reaction is: 4Al + 3O₂ → 2Al₂O₃.