Question

‼️SHOW ALL STEPS‼️ If 14.4 grams of iron reacts with hydrochloric acid, how many grams of hydrogen gas will be produced?

Answer 1

Answer: 0.771 g of $H_2$ will be produced

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$    

$\text{Moles of} Fe=\frac{14.4g}{56g/mol}=0.257moles$

The balanced chemical reaction is:

$2Fe(s)+6HCl(aq)\rightarrow 2FeCl_3(aq)+3H_2(g)$  

According to stoichiometry :

2 moles of $Fe$ produce = 3 moles of $H_2$

Thus 0.257 moles of $Fe$ will produce=$\frac{3}{2}\times 0.257=0.385moles$  of $H_2$  

Mass of $H_2=moles\times {\text {Molar mass}}=0.385moles\times 2g/mol=0.771g$

Thus 0.771 g of $H_2$ will be produced