Question

Calculate the amount of 90% h2so4 required for the preparation of 420 kg of hcl

Answer 1

I am using the method of preparation with Sodium chloride.

Reaction: NaCl + H₂SO₄ ------> NaHSO₄ + HCl (Temperature should be less than 200°C).

Now, Atomic mass of

H = 1

S = 32

O = 16

Cl = 35.5

Hence, molecular mass of sulphuric acid (H₂SO₄)

= 2x1 + 32 + 4x16

= 98

Again, molecular mass of hydrochloric acid (HCl) 

= 1 + 35.5

= 36.5