Balanced equation: Al(NO2)3(aq) + 3 NH4Cl(aq) → AlCl3(aq) + 3 N2(g) + 6 H2O(l)
We shall determine which is the limiting and excess reactant.
Notice that we are given the mass of both reactants: this means we need to determine the limiting reactant, which is the reactant that forms the less amount of product. This is because once the limiting reactant is all used up, the reaction can no longer proceed and make more products.
This means the limiting reactant determines the maximum mass of the product formed.
We need to perform a mole-to-mole comparison between each reactant and AlCl3 (any of the products can be used). In order to do that, we need to determine the molar mass of Al(NO2)3, NH4Cl, and AlCl3.
The molar mass of AlCl3 is:
AlCl3 1 Al × 26.98 g/mol Al = 26.98 g/mol
3 Cl × 35.45 g/mol Cl = 106.35g/mol
Sum = 133.33 g/mol
For Al(NO2)3: From the balanced equation, 1 mol of Al(NO2)3 forms 1 mol of AlCl3. The molar mass of Al(NO2)3 is:
Al(NO2)3 1 Al x 26.98 g/mol Al = 26.98 g/mol
3 N x 14.01 g/mol N = 42.03 g/mol
6 O x 16.00 g/mol O = 96.00 g/mol
Sum = 165.01 g/ 1mol
The mass of AlCl3 formed by 72.5 g Al(NO2)3 is:
58.58 g AlCl3
For NH4Cl: From the balanced equation, 3 moles of NH4Cl forms 1 mol of AlCl3. The molar mass of NH4Cl is:
NH4Cl 1 N x 14.01 g/mol N = 14.01 g/mol
4 H x 1.008 g/mol H = 4.032 g/mol
1 Cl x 35.45 g/mol Cl = 35.45 g/mol
Sum = 53.492 g/mol
The mass of AlCl3 formed by 58.6 g NH4Cl is:
Aluminum nitrite and ammonium chloride react to form aluminum chloride, nitrogen, and water. How many grams of each substance are present after 72.5 g of aluminum nitrite and 58.6 g of ammonium chloride react completely?
Frequently Asked Questions
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 Limiting Reagent concept. You can view video lessons to learn Limiting Reagent. Or if you need more Limiting Reagent practice, you can also practice Limiting Reagent practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Harris' class at UF.
What textbook is this problem found in?
Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.