Competition Problems & Solutions for WUCT 2016

Competition Problems: Individual Exam 1

Competition Problems: Individual Exam 2

Competition Problems: Individual Exam 3

Competition Problems: Relay Round

Competition Problems: Team Round

Solutions: Individual Exam 1

Solutions: Individual Exam 2

Solutions: Individual Exam 3

Solutions: Relay Round

Solutions: Team Round

Individual Exam #1: Chemical Structure and Properties:

Topics include rules for electron filling, bonding models, Lewis structures, VSEPR, hybridization (Localized Electron Model and Molecular Orbital Theory), periodic trends and the deviations, the Born-Haber cycles, shielding and penetration of electrons, orbital energies, properties of gases, creative stoichiometry.

Individual Exam #2: Chemical and Physical Equilibrium:

Topics include acid-base titrations, relative strengths of acids and conjugate bases (Ka and Kb) and vice versa (Lewis acids/bases, Bronsted-Lowry acids/bases), Gibbs free energy, enthalpy, entropy, physical properties and their connection to bonding: enthalpies of vaporization, viscosity, boiling point and melting points, vapor pressure, Raoult's Law, real liquids and ideal liquids, solubility of solids in liquids, Keq, Kc, and Kp.

Individual Exam #3: Kinetics/Electrochemistry/Thermodynamics:

Chemical kinetic topics include the Arrhenius and Van't Hoff equation, rate determining steps, concentration vs. time graphs, half-life concepts, zero order, first order, and second order correlations. Electrochemistry topics include Nernst Equations, galvanic (spontaneous) cells, electrolytic (non-spontaneous) cells, and salt bridges, effects of pH and size, and general diagrams. Thermodynamics topics include heat and work concepts, heat calorimeters (constant pressure) and bomb calorimetry (constant volume).

Team Round:

The team round will all topics covered in the individual rounds. Problems will be organized into different themes, and each question will consist of multiple parts that build upon each other.

Relay Round:

Students should expect to see any concepts covered from the individual rounds to also be present in the relay round.