Question

Conduct an experiment to observe the speed diffusion in two substances

Answer 1

In the experiment to study diffusion using hydrogen chloride (HCl) gas and ammonia (NH4Cl), the experiment is conducted as follows:

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The required apparatus are:

• 2 Cotton buds

• A test tube

• 2 Glass stoppers

• Ammonia solution

• Hydrogen Chloride acid

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Procedure for the experiment: 

• Soak 1 cotton bud into ammonia solution and fix on one end of the testube.

• Soak the other cotton wool on concentrated hydrochloric acid and fix on the other end of the test tube.

• Use the glass stoppers to close both ends of the test tubes.

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The results of the experiment:

• In the test tube, the two gases will diffuse towards each other. 

• When the two gases meet inside the test tube they react with one another and form a ring of Ammonium chloride that is white in color. 

• The ring is formed closer to the end where hydrogen chloride is. This is because hydrogen chloride gas is heavier and diffuses slower than ammonium chloride. 

• This experiment is used to test the rate of diffusion of gases and the speed at which they diffuse.

Answer 2

Answer:

Aim:-

To measure the speed of diffusion of two gases.

Materials required:-

Glass tube with scale, Ammonium solution (NH3), Hydrochloric acid(HCI), pieces of cotton and rubber Corks.

Procedure:-

Take 1 metre long narrow glass tube.

Take two pieces of cotton wool.

Soak one piece of cotton wool in HCI solution.

Soak another piece of cotton wool in in NH3 solution.

Put them separately at the two ends of the tube and observe.

The HCI gives off hydrogen chloride gas and ammonium solution gives of ammonium gas.

Both gases react together to form a white substance call ammonium chloride.

Measure the distance of white precipitate from two ends of the glass tube.

Observation:-

We can observe the ammonium gas travelled faster.So the distance of white precipitate is more from ammonia end then hydrochloric acid end.