conduct an experiment to observe the speed of diffusion of two substances lab activity
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Explanation:
In the test tube, the two gases will diffuse towards each other.
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Answer
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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