Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Sodium and nitrogen combine to form sodium nitride;6Na(s)+N2(g) → 2Na3N(s)a) if 80.0 g of sodium is mixed with 20.0 g of nitrogen gas, what mass sodium nitride forms?b) If the reaction in part "a)" ha

Solution: Sodium and nitrogen combine to form sodium nitride;6Na(s)+N2(g) → 2Na3N(s)a) if 80.0 g of sodium is mixed with 20.0 g of nitrogen gas, what mass sodium nitride forms?b) If the reaction in part "a)" ha

Problem

Sodium and nitrogen combine to form sodium nitride;

6Na(s)+N2(g) → 2Na3N(s)

a) if 80.0 g of sodium is mixed with 20.0 g of nitrogen gas, what mass sodium nitride forms?

b) If the reaction in part "a)" has a percent yield 75.0%, how much sodium nitride is actually produced?

Solution

We’re given the following balanced reaction:

6 Na(s) + N2(g)  2 Na3N(s)


Part A: We’re being asked to calculate the mass of sodium nitride, Na3N, that will be formed in the reaction of 80.0 g Na and 20.0 g N2.


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.


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