Chapter 17, Problem 12STP

Interpretation Introduction

Interpretation:

Using balanced chemical equation, the amount of HCl produced needs to be determined.

Concept introduction:

According to law of conservation of mass, the mass of reactants used is proportional to the mass of products formed.

Answer to Problem 12STP

4.38 g of HCl will be produced.

Explanation of Solution

For the given equation:

$PC{l}_5+H_{2}O\to HCl+H_{3}P{O}_4$

Balance the above equation,

$PC{l}_5+4H_{2}O\to 5HCl+H_{3}P{O}_4$

Now according to law of conservation of mass,

1 mol wt of PCl5 consumed=5 mol wt of HCl produced

$\begin{array}{l}208.25\to 36.5\\ 25\to \frac{36.5\times 25}{208.25}=4.38g\end{array}$

4.38 g of HCl will be produced.

Conclusion

4.38 g HCl will be produced on the consumption of 25 g of PCl_5.