two gases are placed at either end of a tube at room temperature as shown; when they meet a white/yellow precipitate will form. where in the tube do you predict to see the precipitate?

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15-11-2022
Chemistry

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two gases are placed at either end of a tube at room temperature as shown; when they meet a white/yellow precipitate will form. where in the tube do you predict to see the precipitate?

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NomulaHarsh NomulaHarsh · Answer 1 · 2022-11-19T13:54:49+01:00

The precipitate usually forms nearer to the hydrochloric acid end of the tube because hydrogen chloride diffuses more slowly than ammonia.

This is because hydrogen chloride has almost twice the molecular weight of ammonia, and the rate of diffusion is inversely proportional to the square root of the molecular mass of the gas.

What happens when HCl reacts with ammonia?

Ammonia gas reacts with hydrogen chloride gas to produce ammonium chloride.

It is an acidic salt. Ammonium chloride is a weak base whereas HCl is a strong acid. When a weak base reacts with a strong acid, the base is unable to fully neutralize the acid.

What is observed when ammonia is tested with concentrated HCl?

When a glass rod dipped in hydrochloric acid is brought near a jar filled with ammonia, dense yellow fumes are observed.

Thus, when ammonia and HCL meet a yellow/white precipitate is formed neared to the hydrochloric acid end of the tube.

To know more about ammonia with HCL:

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