Question

Mg(OH)2 + HCl → MgCl2 + H2O

Determine the number of moles of magnesium chloride produced when 5.0 mol of HCl is combined with excess Mg(OH)2

Answer 1

Balanced equation

$Mg(OH)_2+2HCl\to\>MgCl_2+2H_2O$

Moles of $MgCl_2=\frac{1}{2}×$ moles of $HCl$

$=\frac{1}{2}×5$

$=2.5$ moles