Question

Chlorine can be obtained by the following reaction.

MnO2 + 4HCl  MnCl2 + Cl2 + 2H2O

How many grams of HCl react with 25 g of MnO2?
How many grams of Cl2 are formed from this reaction

Answer 1

Explanation:

1. 140 gram hcl
2. sorry i don't know

Answer 2

Given info : Chlorine can be obtained by the following reaction.

MnO₂ + 4HCl ⇒ MnCl₂ + Cl₂ + 2H₂O

To find :

1. How many grams of HCl react with 25g of MnO₂ ?
2. How many grams of Cl₂ are formed from this reaction ?

Solution : here we see, 4 mole of HCl react with 1 mole of MnO₂.

molecular mass of MnO₂ = 87 g

Given mass = 25g

so no of moles of MnO₂ = 25/87 = 0.287 mol

so 3.48 mol of MnO₂ react with 4 × 0.287 mol of HCl.

so the required mass of HCl = 4 × 0.287 × molecular mass of HCl

= 4 × 0.287 × 36.5

= 41.9 ≈ 42 g

1 mole of MnO₂ formed 1 mole of Cl₂.

so, 0.287 mole of MnO₂ will produce 0.287 mole of Cl₂

so the mass of Cl₂ = 0.287 × 71 = 20.377 = 20.4 g