Question

Select from the list below the gas that matches the description given in each case and answer the
questions that follows:Ammonia,chlorine,hydrogen chloride,sulphur dioxide.
When gas C is mixed with gas B, dense white fumes are seen and there is no other product.

What is the name of the gas C?

What is the name of the product of the reaction between gas B and gas C ?

Answer 1

• Gas B is Ammonia$\left({\mathrm{NH}}_3\right)$ so when gas C is mixed with gas B, dense white fumes are formed then gas C must be Hydrochloric Acid $\left(\mathrm{HCl}\right)$.
• When Ammonia reacts with Hydrochloric acid, white fumes of Ammonium chloride$\left({\mathrm{NH}}_4\mathrm{Cl}\right)$ are formed.
  ${\mathrm{NH}}_3\left(\mathrm{g}\right)+\mathrm{HCl}\left(\mathrm{g}\right)\to \underset{}{{\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{s}\right)}$

Hence,

• Gas C is Hydrochloric Acid $\left(\mathrm{HCl}\right)$.
• The name of the product of the reaction between gas B and gas C is Ammonium Chloride$\left({\mathrm{NH}}_4\mathrm{Cl}\right)$.