# Which of the given equations correctly represents the neutralization of magnesium hydroxide by hydrochloric acid? "a. "Mg(OH)_2(s)+2HCl(aq) rarr MgCl_2(aq) + 2H_2O(l) "b. "Mg(OH)_2(s)+2HCl(aq) rarr MgO(s) + 2H_2(g) + Cl_2(g) "c. "MgO(s)+2HCl(aq)

## Which of the given equations correctly represents the neutralization of magnesium hydroxide by hydrochloric acid? $\text{a. } M g {\left(O H\right)}_{2} \left(s\right) + 2 H C l \left(a q\right) \rightarrow M g C {l}_{2} \left(a q\right) + 2 {H}_{2} O \left(l\right)$ $\text{b. } M g {\left(O H\right)}_{2} \left(s\right) + 2 H C l \left(a q\right) \rightarrow M g O \left(s\right) + 2 {H}_{2} \left(g\right) + C {l}_{2} \left(g\right)$ $\text{c. } M g O \left(s\right) + 2 H C l \left(a q\right) \rightarrow M g C {l}_{2} \left(a q\right) + {H}_{2} O \left(l\right)$ $\text{d. None of the above}$

$\text{Option A}$
We need a stoichiometric equation that represents the reaction between $M g {\left(O H\right)}_{2}$ and $H C l$, and here it is............
$M g {\left(O H\right)}_{2} \left(s\right) + 2 H C l \left(a q\right) \rightarrow M g C {l}_{2} \left(a q\right) + 2 {H}_{2} O \left(l\right)$
Here, $1$ $\text{equiv}$ of magnesium hydroxide reacts with $2$ $\text{equiv}$ hydrochloric acid. In the reaction that was performed, there were $3.0 \cdot m o l$ hydrochloric acid, and stoichiometric equivalence a $\frac{1}{2}$ $\text{equiv}$ of $\text{magnesium hydroxide}$, i.e. $\frac{3}{2} \cdot m o l$.