Consider the titration of 65 mL of 1.75 M diethylamine, (CH3CH2)2NH (Kb = 1.3×10-3) with 0.25 M HCl. How many mL of HCl will need to be added to the diethylamine solution to reach a pH of 11.11?

The answer is NOT 455 mL or 45.5 mL

a.  Unhealthy exhaust results from the combustion of octane (C8H10) in automobile engines via the following reaction.

C8H18(l) + 25O2(g)  16CO2(g) + 18H2O(g)

Assuming the gasoline is pure octane and that a suburban dweller burns about 6.44 x 104grams of octane (about 20 gallons) per week. How many grams of CO2 are produced (per week) to warm the globe? At 25oC and 1.00 atm, how many ml of CO2 are produced? Give your answer in scientific notation,

b.   During combustion, N2 and O2 in the air react to make the nasty brown gas NO2which is smog. The smog rises up into the atmosphere, combines with water vapor and rains down as nitric acid (HNO3) to acidify all the lakes and streams and kill the fish and plants. The following reactions are relevant.
A. O2(g) + N2 (g)  2NO(g)

B. 2NO(g) + O2(g)  2NO2(g)

C. NO2(g) + H2O(g)  HNO3(aq) + NO(g)

Balance reaction C. Calculate the moles of HNO3 that form if 2.2 x 10-4 moles of NO2rise up into the air and react completely with an unlimited amount of water vapor.

  c.    A 200 mL sample of the lake water is collected titrated directly with 0.01M NaOH and it takes only 3 mL of the NaOH titrant to reach the equivalence point. Calculate the molarity (M) of HNO3 in the lake water.

d. Nitric acid is a strong acid and engages in the following ‘proton’ transfer(dissociation) reaction with water (in which it is dissolved).

HNO3(aq) + H2O(l)  H3O+(aq) + NO3-(aq)

Suppose the concentration of HNO3 in the lakewater is 0.08 mg/mL. Calculate the molarity of H3O+ and the pH of the lakewater.

Determine the pH of each of the following two-component solutions.

0.270 M NH4NO3 and 0.100 M HCN

8.0×10⁻² M RbOH and 0.120 M NaHCO3

8.2×10⁻² M HClO4 and 2.2×10⁻² M KOH

0.110 M NaClO and 5.50×10⁻² M KI

What is the pH of a solution that is 1.3 M NH3? ( Ka=5.70 x 10^-10 for NH4+).

For each of the following molecules, predict the molecular shape, give bond angles, hybridization and determine whether the molecule will be polar or non-polar.

a. CF4

b. BeH2

c. SeF6

d. XeOF2

Briefly explain how aqueous base can cause some water-insoluble compounds to become water-soluble. (b) Answer the same question for aqueous acid.

Calculate the total pressure at equilibrium when 0.35 atm of phosphorus pentafluoride dissociates according to the equation below at 288 K, if Kc = 1.7 × 10–6 . PF5(g) PF3(g) + F2(g)

What is the amount of energy emitted in KJ from a photon given off by a sulfur atom with a wavelength of 702.3 nm?

What is happening to the electron relative to the nucleus when ?E=0? ?E>0? ?E<0?

At a certain temperature, 0.900 mol SO3 is placed in a 5.00 L container.

2SO3(g)−⇀↽−2SO2(g)+O2(g)

At equilibrium, 0.110 mol O2 is present. Calculate Kc.

The data shown below were collected for the following second-order reaction:
Cl(g)+H2(g)→HCl(g)+H(g)Cl(g)+H2(g)→HCl(g)+H(g)

A)Use an Arrhenius plot to determine the activation barrier for the reaction

B)Use an Arrhenius plot to determine the frequency factor for the reaction.

A lab technician is trying to prepare 100. mL glucose solution with a concentration of 5.0% by mass for a clinical trial. How many grams of glucose should he use to prepare this 100-mL solution? Assume the density of 5% glucose solution is previously reported as 1.02 g/mL.

Find the pH of 0.190M NaCN solution. For HCN, Ka=4.9?10?10.

Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. Kb= 6.3×10−5for trimethylamine, (CH3)3Nand Ka= 1.9×10−5for hydrazoic acid, HN3. 0.114mol L−1(CH3)3N(aq) 0.124 mol L−1HN3(aq) 0.102mol L−1HI(aq) 0.113mol L−1KOH(aq) Provide simple instructions for preparing 1.00 L of a buffer solution having pH = 9.00 at 298 K. Focus on preparing the buffer that containsthe highest possible concentrations of the active components. Your instructions should include the volumes of the solutions require