How is ammonia gas prepared in the
laboratory? Explain with a diagram.
Ans.
- A mixture of ammonium chloride and slaked lime in the ratio 3:2 is taken in a hard glass test tube. A cork with a delivery rube is fixed to the test tube. The delivery tube is attached to the lower end of a lime tower. The apparatus is arranged as shown in the figure.
- The test tube is heated.
- The gas is allowed to pass through the lime tower to dry it.
- The ammonia gas is collected by holding an inverted gas jar over the lime tower, by the downward displacement of air.
- The gas jar is slowly removed from the lime tower and covered with a glass lid.
