1. Select the strongest acid from the following: A) HNO3 or HNO2 B) HCl or HBr 2. Select the strongest base from the following: C) ClO- or ClO2- 3. Which will be more soluble in an acidic solution? D) PbCl2 or PbF2

For the titration of 15.0 mL of 0.200 M HCl with 0.200 M NaOH. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) a) What is the initial pH? pH =  b) What is the pH after the addition of 5.00 mL of NaOH ? pH =  c) What is the pH after the addition of 15.0 mL of NaOH? pH =  d) What is the pH after the addition of 20.0 mL of NaOH? pH = 

Consider the following reaction: 2HI(g) → H2(g) + I2(g) If the initial concentration of HI was 0.350 M and the concentration of HI was 0.025 M after 0.100 s, what is the rate of the reaction?

The vapor pressure of a liquid is 47.1 kPa at 269 K and 10.5 kPa at 264 K. What is the enthalpy of vaporization of the liquid ? You must show all of your work including units for credit.

A 0.150 M solution of a weak base, B, has a pH of 8.80. Calculate the value of Kb for the base. Hint: Write the reaction between the base B and water (B + H2O → BH+ + OH-), and use on ICE Table. You must show all of your work for credit.

1. Select the strongest acid from the following: A) HClO3 or HClO2 B) HBr or HF 2. Select the strongest base from the following: C) BrO- or BrO2- 3. Which will be more soluble in an acidic solution? D) CuCl2 or CuF2

A reaction vessel is charged with COF2, which partially decomposes to carbon dioxide and carbon tetrafluoride. 2COF2(g) ⇌ CO2(g) + CF4(g) When the system comes to equilibrium at 1000oC,  partial pressure of COF2 = 1.50 atm, partial pressure of CO2 = 0.135 atm and partial pressure of CF4 = 0.255 atm. Show all your work and setup for credit. A) Calculate KP for this reaction. B) Calculate KC for this reaction.

Classify the following as Lewis acid or Lewis base. a) NBr3 b) Cr3+

Consider the following reaction: N2O4(g) ⇌ 2NO2(g)   Kp = 47.9 at 400 K Suppose that 2.50 atm of N2O4 decomposes and reaches equilibrium at 400 K. Determine the partial pressure of NO2 at equilibrium. Show all of your work including the ICE chart for credit.

Select the strongest intermolecular force in each of the following. 1) Cl2 – 2) C2H6 – 3) NF3 – 4) BF3 – 5) CH3Cl –