Question

Under similar conditions of pressure and temperature, 40 ml
of slightly moist hydrogen chloride gas is mixed with 20 ml of
ammonia gas, the final volume of gas at the same temperature
and pressure will be
(a) 100 ml (b) 20 ml
(c) 40 ml (d) 60 ml

Answer 1

The the final volume of gas at the same temperature  and pressure will be 20 ml.

option (B) is correct.

Explanation:

The reaction between ammonia and hydrochloric acid is given below:

NH3 + HCL --> NH4Cl

According to the given question:

• Amount of ammonia = 20 ml
• Amount of HCl = 40 ml

1 ml NH3 reacts with 1 ml HCl to produce 1 ml of NH4Cl.

So, 20 ml of ammonia reacts with 20 ml of HCl to produce 20 ml of resultant NH4Cl.

The rest of HCl will stay unreacted.

Thus the the final volume of gas at the same temperature  and pressure will be 20 ml.

Also learn more

What happens when enough NaOH solution is added to HCL solution? What is the reasons for this reaction? What do you find when pH of the solution becomes 7?

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