20 Minute Review QuizletAnswers
1. Calculate the activity of 0.100 m Ti(NO3)2 . The result should be expressed in terms of .
(Dont bother to find explicitly).
Answer: Note that m+ = mTi2+ = m and m- = mNO3- = 2 m. The overall activity is then:
2
2
3 m+ m-
UV Spectra of Conjugated Carbonyl Compounds.1
Experimental
209 nm
AM1 (nm)
223.31
215
223.97
O
Experimental
239 nm
241
250.89
251
281.22
259
317.92
266
291.11
294
329.09
304
O
AM1 (nm)
263.50
327.85
O
O
O
219
236.64
O
O
221
Cl
238.45
O
O
O
221
237. 10
O
O
Handin 10 Answers
Introduction for Question 1:
Consider a central ion, i, surrounded by neighbors, j. The j neighbors include all anions and cations in
the solution other than ion, i. The Poisson equation for a spherical ion in solution is:
1 2(r i(r) -(r
Handin Homework 8: Thermochemistry and Entropy
1. The enthalpy of formation of urea is -333.0 kJ mol-1 at 298.2 K. Calculate the internal energy
of formation at the same temperature. Urea is CH4N2O.
Answer: The balanced reaction for the formation of urea
Handin 11b: Chemical Potential of Solutions
Fill in the following beakers with appropriate mole fractions and partial pressures. In other
words, does the chemical potential equation apply to a one phase or two phase system, pure
substance, gas mixture, or
Handin Homework 10: Phase transitions
2. The normal melting point of CCl4 is 22.0C. At 22.0C the vapor pressure is 10.0 mmHg.
The liquid and solid densities are 1.63 and 1.80 g cm-3, respectively. The normal boiling point is
76.8C.
a. Make a qualitative p
Handin Homework 9: Free Energy
1. In an isothermal expansion of an ideal gas U=0. The value is not zero for a real gas. Using
the Van der Waal's equation of state, find U for an isothermal expansion from V1 to V2 .
nRT
n2
U
P
Hints: Van der Waal's: P = (
Handin Homework 7
1. Background: The total differentials of U and H are:
U
U
U
dU = dV + dT = dV + Cv dT
VT
T V
VT
H
H
H
dH = P dP + T dT = P dP + Cp dT
T
P
T
This problem explores the relationship between the partials with respect to V and P.
H
U
Pro
Handin 2: Concentration
1. Calculate the molarity of a 0.238 m solution of citric acid (M(citric acid) = 192.12 g mol-1).
The density of the solution is 1.0186 g mL-1.
Answer: We need to use Eq. 2.2.11 to convert molality to molarity. Assume that we have
Handin 4: Kinetics Mechanisms
1. The decomposition of HI is given by the reaction 2 HI H2+ I2. One proposed mechanism is:
k1
HI H + I
k2
H + HI H2 + I
k3
2 I + M I2 + M
Use the steady-state approximation to find the rate law for this mechanism. Show that
Handin Homework 6
CH341
1. How ideal is water vapor? To answer this question, try the following problem: Assume a
volume for a closed flask of 10.000 L, a temperature of 298.15K, and 0.01280 moles of gas.
Calculate the pressure of water vapor in the flask
Handin 5: Mechanistic Kinetics
1. Consider a reaction with the stoichiometry: A + B C + D. Assume that both A and
B absorb at a specific wavelength, while C and D do not. Assume also that A is the
limiting reagent, [A]o < [B]o. Remember that the concentra
Handin Homework 12: Solutions and Chemical Equilibria
1. When 640. mg of naphthalene is dissolved in 40.0 g of chloroform, the boiling point of the
solution is 0.455C higher than that of pure solvent (61.2C). Calculate (a) the molal boiling
point elevatio