Chem120 quizzes

However, quizzes are available for you to test your own ability to solve problems. If your student ID and name are not on the lest, please send them in a e-mail to cchieh@uwaterloo.ca.

• Deadlines for quizzes set a schedule for your learning, and we hope you acquire the skills gradually to build a solid foundation on which to build your dream career.

• After a quiz, assess your strength and weakness. Please find ways to improve your learning.

• Please be patient when you write your quiz. The information goes through a very complicated process over the internet. If you have encountered any problem or difficulty, please immediately E-mail cchieh@uwaterloo.ca. and tell him your detailed story. Please include your ID number regarding quiz problems.

• Usually, a mark is assigned according to the performance at the time. Writing a quiz is a performance. A mark is assigned with certain rules. Certain procedures must be implemented in unsupervised quizzes over the Internet in order to be fair to all, and you must follow these procedures.

  For example, submit your answer only once. Each time you click the Submit button is counted as an attempt. These days, clicking a mouse is an act that you have to be responsible for.

• Questions and Answers on Quizzes summarize difficulties some students have had. Read it to avoid the same difficulties. Some of them actually are fun to read.

1. Measurements and Units 01/09/13 - 02/10/11
   • Express quantities using scientific notations
   • Give the seven basic SI units
   • Give derived SI units to commonly used units and vice versa
   • Use prefixes for large and small quantities
   • Do unit conversion
   • Measurements review

2. Chemical stoichiometry 01/09/13 - 02/10/04
   • Express amounts of substances in various units including moles
   • Correlate chemical formulas with quantities
   • Predict quantitative relationship from reaction equations
   • Determine excess & limiting reagents in reactions
   • Calculate theoretical and practical yields
   • Stoichiometry review

3. Solutions and Reactions 01/09/20 - 02/10/11
   • Define saturated, unsaturated and over saturated solutions
   • Convert units for concentration solutions
   • Calculate quantities related to chemical analyses
   • Determine quantities reacted or produced
   • Find percentage of a salt in a mixture of salts with common ions, for example, Extra Problems B1, B2, B3 and B4.
   • Solutions & Reactions review

4. Properties of gases 01/09/27 - 02/10/25
   • Describe Avogadro's theory about gases
   • Describe Boyle's, Charles', and Daltons' law of gases
   • Apply gas laws and the ideal gas law to calculate quantities of gases
   • Apply gas laws for stoichiometry calculations involving gases
   • Describe the kinetics of gases and compare rates of diffusion of various gases
   • Gases review

5. Thermochemistry - Energy in chemical reactions 01/09/27 - 02/11/01
   • Explain the Principle of Conservation of Energy
   • Define internal energy and enthalpies of reactions
   • Explain Hess's law and apply it to quantities in chemical reactions
   • Describe the principles for experiments using calorimeters
   • Calculate quantities, including energies, in chemical reaction for a given condition

6. Quantum theory of the H atom 01/09/27 - 02/11/08
   • Describe the electromagnetic spectrum
   • Calculate energy, wavelength, frequency by applying Max Planck's equation
   • Describe the line spectrum of the hydrogen atom
   • Apply the Rydberg formula to calculate energy, wavelength, and frequency of light emitted by hydrogen
   • Give the names of quantum numbers describe their rules
   • Apply the Pauli exclusion principle and Hund's rule to assign electronic configurations of atoms
   • Quantum review

7. Electronic configuration and the periodic table 01/09/27 - 02/11/15
   • Correlate electronic configurations of atoms and their location on and the periodic table
   • Describe atomic properties of elements in view of their electronic configurations
   • Apply common sense to explain the trends of atomic properties of elements
   • Periodic Table review

8. Ionic solids 01/09/25 - 02/11/22
   Bring a Periodic Table to write this quiz
   • Give the features of ionic solids and bonding in them
   • Define electronegativity and describe trends of variation in the period table
   • Define valence electrons, and give the number of valence electrons in for main-group elements
   • Give electronic configurations for ions
   • Give electronic configurations for transition metal ions
   • Compare ionic radii
   • Write Lewis dot structures for molecules
   • Apply Born-Haber cycle to evaluate quantities in chemical reactions
   • Ionic bonding review

9. Chemical bonding 01/09/25 - 02/11/29
   • Define bond order, bond length & bond (dissociation) energy
   • Describe sigma and pi bonds and multiple bonds in CH₂=CH₂ and C₂H₂ etc.
   • Draw Lewis dot structures and assign formal charges
   • Describe octet rule and give examples for exceptions of octet rule
   • Draw resonance structures for molecules and ions
   • Define electron affinity and electronegativity
   • Chemical bonding review

10. VSEPR Theory - shapes of molecules 01/09/25 - 02/12/06
    • Describe VSEPR Theory
    • Identify central atom in a molecule or ion
    • Evaluate electron pairs (or VSEPR pairs or steric number) & molecular geometry
    • Describe the geometry of the molecule using linear, bent, trigonal planar, tetrahedral, trigonal pyramidal, trigonal bipyramidal, see saw (or butterfly), T-shape, octahedral etc.
    • Describe the shapes of hybrid orbitals and molecular shapes
    • Draw relative energy levels of molecular orbital
    • Figure out the electronic configuration of a molecule, and determine the bond order and predict other properties such as magnetic properties
    • VSEPR Theory summary

Click Quiz to begin.