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Problem: Ammonia, NH3(g), and hydrogen chloride, HCl(g), react to form solid ammonium chloride, NH4Cl(s):NH3(g) + HCl(g) → NH4Cl(s)Two 2.50 L flasks at 30.0 oC are connected by a stopcock, as shown in the drawingOne flask contains 5.60g NH3(g), and the other contains 4.60 g  HCl(g). When the stopcock is opened, the gases react until one is completely consumed.What will be the final pressure of the system after the reaction is complete? (Neglect the volume of the ammonium chloride formed.)

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Balanced reaction: NH3(g) + HCl(g) → NH4Cl(s)

Step 1: Calculate the number of moles of each reactant then determine the amount of products produced by each

Molar masses of  NH3(g) and HCl(g) will be needed to convert grams to moles

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Problem Details

Ammonia, NH3(g), and hydrogen chloride, HCl(g), react to form solid ammonium chloride, NH4Cl(s):
NH3(g) + HCl(g) → NH4Cl(s)
Two 2.50 L flasks at 30.0 oC are connected by a stopcock, as shown in the drawing

Two gas flasks are connected by a tube with a stopcock. NH3 is in the flask on the left and HCl is in the flask on the right.

One flask contains 5.60g NH3(g), and the other contains 4.60 g  HCl(g). When the stopcock is opened, the gases react until one is completely consumed.

What will be the final pressure of the system after the reaction is complete? (Neglect the volume of the ammonium chloride formed.)

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Gas Stoichiometry concept. If you need more Gas Stoichiometry practice, you can also practice Gas Stoichiometry practice problems.

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Based on our data, we think this problem is relevant for Professor Anderson's class at TEXAS.