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: When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms: Zn(s) + S8(s) ⟶ZnS(s) [unbalanced] Some of the reactants also combine with oxygen in air to form zinc oxide and sulfur dioxide. When 83.2 g of Zn reacts with 52.4 g of S8, 104.4 g of ZnS forms.
(a) What is the percent yield of ZnS?

Solution: When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms: Zn(s) + S8(s) ⟶ZnS(s) [unbalanced] Some of the reactants also combine with oxygen in air to form zinc oxide

Problem

When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms: Zn(s) + S8(s) ⟶ZnS(s) [unbalanced] Some of the reactants also combine with oxygen in air to form zinc oxide and sulfur dioxide. When 83.2 g of Zn reacts with 52.4 g of S8, 104.4 g of ZnS forms.
(a) What is the percent yield of ZnS?