Week 14 notes Chem 222
Week 14 notes Chem 222 Chem 222
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This 1 page Class Notes was uploaded by Leslie Pike on Friday May 6, 2016. The Class Notes belongs to Chem 222 at Western Kentucky University taught by Darwin Dahl in Spring 2016. Since its upload, it has received 15 views. For similar materials see College Chemistry 2 in Chemistry at Western Kentucky University.
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Date Created: 05/06/16
Chemistry 222 final will be 70 questions. You will have 110 minutes. It will be in the same room we have had lecture all semester. Bring a pencil, non-programmable calculator, and an eraser. Dahl will provide a scantron. Exam is curved. Half of the questions right is a 70%. You will be tested over atomic and molecular structures, bonding, stoichiometry, equilibrium, redox reactions and electrochemistry, periodic table trends, and solutions. You will be provided with a periodic table, equations, and constants. You will not have to memorize these things (phew!). Things to review for the exam: Quantum numbers. The principle quantum number n=1,2,3,… It is the energy level. The outer energy level of potassium has a quantum number of 4. The subshell l=0,1,2,...,n-1. 0 is for s, 1 is for p, 2 is for d, and 3 is for f. Direction m l -l,…,0,…,+l. For example, if you are in the p subshell, this quantum number would tell you if you were in the px, py, or pz orbital. Spin is +1/2 or -1/2. Lewis structures and polarity Geometry and AXE. Electron pairs are counted in hybridization. Double bonds are not. Carbon dioxide consists of a carbon double-bonded to two oxygens, but it is sp hybridized because only two things are attached to the carbon atom. Water consists of an oxygen atom with two hydrogen atoms and two lone pairs of electrons. It is sp3 hybridized. Colligative properties and van’t Hoff factor. The van’t Hoff factor is the number of pieces that an ion splits into (2 for NaCl and 3 for CaCl , et2.) Rate expression: rate=dM/dt. There is a negative sign in front of the dM/dt if x y the species in question is a reactant. Rate law: rate=k[A] [B] . Reaction order=x+y. Order is determined EXPERIMENTALLY and is equivalent to the rate determining step. Products are not included in rate laws. Energy=h*c/lambda. Lambda is wavelength in meters, c is the speed of light in m/s, and h is Planck’s constant. Specific heat= amount of heat required to raise one gram of the substance 1 degree C. Heat capacity is the amount of heat required to raise something (such as a calorimeter) one degree C.
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