Question

MnO2 + 4HCl = Cl2 + MnCl2 + 2H20How many moles of HCl will react with 4.50 moles of MnO2

Answer 1

Since we have been given the balanced reaction, we can just follow the stoichimetry of the reaction to calculate it.

By the stoichimetry, 1 mol of MnO₂ reacts with 4 moles of HCl. using Rule of three, we have:

1 mol MnO₂ --- 4 mol HCl

4.50 mol MnO₂ --- x

$\begin{gathered} \frac{1mol}{4.50mol}=\frac{4mol}{x} \\ x=(\frac{4.50\cdot4}{1})mol \\ x=18mol \end{gathered}$

So, 18 moles of HCl will react with 4.5 moles od MnO₂ (assuming complete reaction).