Question

mg react with hcl to give hydrogen what is minimum weight of hcl required to produce 12g hydrogen​

Answer 1

Answer:

438 g of HCl

Explanation:

A.T.Q.

Magnesium (Mg) reacts with Hydrochloric acid (HCl) to produce Magnesium chloride (${\sf{ Mg{Cl}_2 )}}$ and Hydrogen gas (${\sf{ {H}_2 ) .}}$

Therefore,

The balanced chemical reaction is :

→ ${\sf{Mg + 2HCl \rightarrow Mg{Cl}_2 + {H}_2}}$

From this reaction, we get the information that,

1 mol of ${\sf{ {H}_2 }}$ is produced by 2 mol of HCl

• Molar mass of ${\sf{ {H}_2 }}$ = 2 g/mol
• Molar mass of HCl = 36.5 g/mol

In terms of weight, we can write that,

→ 2 g of ${\sf{ {H}_2 }}$ is produced by (2 × 36.5) g of HCl

→ 1 g of ${\sf{ {H}_2 }}$ is produced by [ (2 × 36.5) / 2 ] g of HCl

→ 1 g of ${\sf{ {H}_2 }}$ is produced by 36.5 g of HCl

Now,

Minimum weight of HCl required to produce 12 g of ${\sf{ {H}_2 }}$ = (36.5 × 12) g of HCl

= 438 g of HCl