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4 years ago

When the equation Fe + Cl2 ----> FeCl3 is correctly balanced the coefficient for Cl2 is

1 answer:

4 0

The correct answer is D. Using the law of conservation of mass the number of atoms on each side of the equation should be equal. Through introspection, we find that there are 2 $Cl$ atoms on reactant side as opposed 3Cl atoms on product side. If we add a coefficient of 3 on $Cl_2$ we get

$Fe + 3Cl_2 ==> FeCl_3$ .

Now there are 6Cl atoms on reactant side and 2 on product side, hence we add a coefficient of 2 on both $FeCl_3$ and $Fe$ . The balanced chemical equation is,

$2Fe + 3Cl_2 ==> 2FeCl_3$

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4 years ago

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The net ionic equation:

$Ca^{2+}(aq)+CO_{3}^{2-}(aq) \rightarrow CaCO_{3}(s)$

Explanation:

The given chemical reaction is as follows.

$(NH_{4})_{2}CO_{3}(aq)+Ca(ClO_{4})_{2}(aq) \rightarrow CaCO_{3}(s)+2NH_{4}ClO_{4}(aq)$

The total ionic equation is as follows.

$2NH_{4}^{+}(aq)+ CO_{3}^{2-}(aq)+Ca^{2+}(aq)+2ClO_{4}^{-}(aq) \rightarrow CaCO_{3}(s)+2NH_{4}^{+}(aq)+2ClO_{4}^{-}$

Similar ions on the both sides of the reaction will be cancelled.

The remaining reaction is

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$Ca^{2+}(aq)+CO_{3}^{2-}(aq) \rightarrow CaCO_{3}(s)$

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