Ch.13 - Chemical KineticsWorksheetSee 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: Nitrification is a biological process for removing NH 3 from wastewater as NH4+:NH4+ + 2 O 2 ⟶ NO3− + 2 H+ + H2OThe first-order rate constant is given ask1 = 0.47e0.095(T − 15˚C)where k1 is in day −1

Problem

Nitrification is a biological process for removing NH 3 from wastewater as NH4+:

NH4+ + 2 O 2 ⟶ NO3 + 2 H+ + H2O

The first-order rate constant is given as

k1 = 0.47e0.095(T − 15˚C)

where k1 is in day −1 and T is in ˚C. If the initial concentration of NH 3 is 3.0 mol/m3, how long will it take to reduce the concentration to 0.35 mol/m3 in the winter (T = 10˚C)?