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