Chapter 11 / Midterm Review
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Transcript of Chapter 11 / Midterm Review
Chapter 11 / Midterm ReviewHonors Chemistry
Ms. Snarrenberg 2013
Question Types
Orbital Shapes
Orbital Diagram
Electron Configuration
Noble Gas Configuration
Q = -Q (Tf and non-Tf)
Light equation problems x 3
Endo/Exo practice Enthalpy Valence / Unpaired electrons
Stoichiometry: Limiting Reactant Problem, % Yield
Absorption / Emission Drawing
E/λ/ν relationship
Orbital Shapes
Draw the shapes of the s, p and d orbitals
Orbital Diagram
Draw the orbital diagram for copper.
Electron Configuration
Give the long-hand electron configuration and the Noble Gas configuration for strontium.
Energy/λ/ν
As energy increases, wavelength ______________ and frequency ______________.
The symbol for wavelength is _____ and the symbol for frequency is _____.
Which has a higher frequency: ultraviolet light or radiowaves?
Stoichiometry
If 5.00 g of calcium carbide and 5.00 grams of water are reacted in the equation below, how much of the excess reactant will remain after the limiting reactant has been consumed?
CaC2 + H2O Ca(OH)2 + C2H2
Answer
CaC2 is the limiting reactant
2.18 g H2O will remain
Light Equations
What are the two light equations and the combined light equation? Give the numerical values for the constants in these equations.
Light Equations
What is the frequency of a photon with a wavelength of 620 nm?
c = λνE = hνc = 2.998 x 108 m/sh = 6.6262 x 10-34 Js
Answer
620 nm = 6.2 x 10-7 m
ν = 4.18 x 1014 Hz
Light Equations
What is the energy of a photon with a wavelength of 3.7 x 10-8 m?
Answer
E = 5.4 x 10-18 J
Absorption / Emission
Draw a Bohr model diagram of an atom for the absorption of energy and the emission of energy in the form of light.
Valence / Unpaired
How many valence electrons and unpaired electrons does tin (Sn) have?
Answer
4 valence electrons
2 unpaired electrons
Calorimetry
A 15.0 g sample of nickel is heated in a burner flame. It is dropped into a 200.0 g sample of water. The water rose from 26 ºC to 29 ºC. What was the temperature of the metal before it was placed in the calorimeter? (sNi = 0.440 J/g°C)
Answer
Ti = 400°C
***Bonus*** What does specific heat mean?
Stoichiometry
When a student heated 1.25 g of mercuric oxide in the lab, the student obtained 1.09 g of mercury. What is the percent yield of this student’s experiment? (Hint: what should the theoretical yield have been?)
2HgO 2Hg + O2
Answer
Theoretical yield: 1.16 g
% Yield: 94.0%
Enthalpy