Answer to Question #183495 in General Chemistry for Krissy

Question

1. In testing for the effectiveness of an antacid compound, 5.0 g hydrochloric acid is mixed with magnesium hydroxide.
2. Write a balanced equation for the reaction.                       

a.Determine the number of moles of magnesium hydroxide required to react with the acid.                                               

b.If there is 24.0 g magnesium hydroxide in the lab, determine if it will be enough to react with all the acid.       

Answer 1

$Mg(OH)_2(s) + 2HCl(aq) → 2H_2O(l) + MgCl_2(aq)$

Moles of HCl$=\frac{5.0}{36.458}=0.137mol$

Moles of $Mg(OH)_2=\frac{0.137}{2}=0.0685mol$

Moles would be$= \frac{24}{58}=0.414mol$

Yes it would be enough