Hydrochloric acid produces a gas. So does ammonia solution. These two gases react when they meet to form a white solid called ammonium chloride. Some cotton wool soaked in hydrochloric acid was placed at one end of a glass tube. Some cotton wool soaked in ammonia solution was placed at the other end. The diagram shows what happened.
a)What is the name of the process by which the gases move along the tube?
b)Explain how this process takes place.
c)The particles of hydrochloric acid have a greater mass than the particles of ammonia. Suggest why the ammonium chloride is formed nearer to the hydrochloric acid end of the tube than the ammonia solution end.
Answers
Answered by
12
a) The name of the process by which gases move along the tube is diffusion.
Diffusion can be described as a process by which particles move from an area of higher concentration to an area of lower concentration along a concentration gradient.
b) The process takes place as follows:
- The gas molecules collide with the air molecule in the tube.
- The particles of gas move from an area of higher concentration to an area of lower concentration by the process of diffusion.
c) The ammonium chloride is formed near the hydrochloric acid end of the tube because hydrogen chloride diffuses more slowly than ammonia.
The rate of diffusion is inversely proportional to the square root of the molecular mass of the gas hence the as the molecular mass of hydrochloric acid is more, its diffusion will be less.
Similar questions