Question

Mg + HCl -> MgCl2 + H2

When the equation is balanced what should the coefficient for magnesium chloride be

Answer 1

Step-by-step explanation:

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Answer 2

The correct answer is option F) 1.

The unbalanced equation for the reaction between magnesium (Mg) and hydrochloric acid (HCl) is:

`\[ Mg + HCl \rightarrow MgCl_2 + H_2 \]`

To balance this chemical equation, we need to ensure that the number of atoms of each element on the reactant side equals the number on the product side. In this case, we have one magnesium (Mg) atom on the left and two on the right, so we need to balance this by placing a coefficient of 2 in front of Mg on the left side:

`\[ 2Mg + HCl \rightarrow MgCl_2 + H_2 \]`

Now, the magnesium atoms are balanced. However, this adjustment affects the number of hydrogen (H) atoms on the right side. We have two hydrogen atoms on the left but only one on the right. To balance the hydrogen atoms, we place a coefficient of 2 in front of
`\( H_2 \)` on the right side:

`\[ 2Mg + 2HCl \rightarrow MgCl_2 + 2H_2 \]`

Now, the chemical equation is balanced. The coefficient for magnesium chloride
`(\( MgCl_2 \))` is 1. Therefore, the correct answer is F) 1.