Chapter 5, Problem 126AE

Interpretation Introduction

Interpretation: The formula of manganese chloride in the product of given reaction of manganese with $\text{HCl}$ is needed to be identified, if the mass of manganese and volume of produced ${\text{H}}_{\text{2}}$ are $\text{2}\text{.747}\text{g}$ and $\text{3}\text{.22}\text{L}$ respectively.

Concept introduction:

• Number of moles of a substance,

  From its given mass is,

$\text{Number of moles}\text{=}\frac{\text{Given}\text{mass}}{\text{Molecular}\text{mass}}$

According to ideal gas equation,

$\text{Number}\text{of}\text{moles}\text{=}\frac{\text{Pressure}\times \text{Volume}}{\text{R}\text{×}\text{Temperature}}$

• Balance equation of a reaction is written according to law of conservation of mass.
• Mole ratio between the reactants of a reaction is depends upon the coefficients of reactants in a balanced chemical equation.