Complete and balance the following equations, and identify the oxidizing and reducing agents. (Use the lowest possible coefficients. Include states-of-matter (s), (l), (g), (aq) similar to the given reaction.)

1.

(a)    Tl₂O₃(s) + NH₂OH(aq) ? TlOH(s) + N₂(g) (basic solution)

(b)What is the oxidixing agent?

2.

(a)    I₂(s) + OCl^-(aq) ? IO₃^-(aq) + Cl^-(aq) (acidic solution)

(b) What is the oxidizing agent?

(c) What is the reducing agent?

3.

(a) MnO₄^-(aq) + Cl^-(aq) ? Mn²⁺(aq) + Cl₂(g) (acidic solution)

(b) Reducing agent?

4.

(a) H₂O₂(aq) + Cl₂O₇(aq) ? ClO₂^-(aq) + O₂(g) (basic solution)

(b) Oxidizing agent?

(c) Reducing agent?

Consider the titration of 30.0ml of 0.030 M NH3 (Kb=1.8 x 10^-5) with 0.025M HCl. What is the pH after the addition of 36.0mL of HCl?

Styrene is polymerized by free radical mechanism in solution. The initial monomer and initiator concentrations are 1 M and 0.001 M, respectively. At the polymerization temperature of 60ºC, the initiator efficiency is 0.30. The rate constants at the polymerization temperature are as follows:

kd= 1.2 x 10-5 s-1

kp= 176 M-1s-1

kt= 7.2 107m-1s-1

Given this information, determine the following;

a. Rate of initiation at 1 min and at 16.6 hrs

b. Steady-state free radical concentration at 1 min

c. Rate of polymerization at 1 min

d.Average free-radical lifetime, t,at 1 min, where t is defined as the radical

concentration divided by the rate of termination.

1) Determine how the following error would affect calculated the percent yield of alum. (increase, decrease, no effect). Briefly explain.

- Alum Sample was not dried completely in the oven.

Describe the following techniques (Fourier transform spectroscopy):

a. Michelson interferometer

b. Diffuse reflectance

c. Attenuated total reflectance method

Assign oxidation states to each atom in each of the following species.

Part A

N2

Part C

HgS

Part D

CH4

Part E

Cr2O72?

Part F

HCO3?

An air parcel has a temperature of 30 degrees Celsius and a relative humidity of 50% at an air pressure of 1000mb. Compute the following:

a) water vapor pressure

b) mixing ratio

c) specific humidity

d) specific heat of moist air at constant pressure; and,

e) virtual temperature

how many molecules of ATP are produced in the complete oxidation of a 12-carbon satuated fatty acid?

A sample of a chemical substance was decomposed in the laboratory and found to have 29.00g C, 12.17g H, and 33.83g N.

a)Find the molecular formula of this compound if the Formula mass is 62.12 g/mole.
b)Determine how many H atoms would be in a 2.70g sample of this compound.

In industry, time is money. Each analysis requires a specified amount of time. If each analytical run requires 2 minutes, what is the minimum amount of time required to sufficiently analyze a single sample? Consider all parts of the analysis from calibration to quality assurance. Explain where all of the time is used.

Write net ionic equations for the reactions that take place when aqueous solutions of the following substances are mixed.

1) ammonium chloride and sodium hydroxide

2) sodium cyanide and Ammonium bromide

3)sodium hydrogen sulfite and potassium cyanide

4)sodium hypochlorite and ammonia

Discuss each conclusion below from a study of redox reactions:

a) The sulfide ion functions only as a reducing agent

b) The sulfate ion functions only as an oxidizing agent

c) Sulfur dioxide functions as either an oxidizing agent or a reducing agent

Determine the pH of an HF solution of each of the following concentrations.

0.290 M

4.50x10^-2 M

2.50x10^-2 M

A student mixes 31.0 mL of 3.06 M Pb(NO3)2(aq) with 20.0 mL of 0.00193 M Na2SO4(aq). How many moles of PbSO4(s) precipitate from the resulting solution? What are the values of [Pb2 ], [SO42–], [NO3–], and [Na ] after the solution has reached equilibrium at 25 °C?

.......mol .....Ksp={PbSo4}=2.5 * 10^-8

part 2:

what are the valuse of [Pb^+2], [SO4^-2], [NO3^+] after the solution has reached equilibrium at 25 C?

You will apply the oxidation reaction to 9-fluorenol to obtain 9-fluorenone:

1. Describe the role of each chemical in this reaction.

2. What is the actual oxidizing agent in this experiment? What is it reduced to?

3.After all of the 9-flurenol has undergone reaction, it is necessary to destroy the excess oxidizing agent in the reaction mixture. How is this done?

4. Imagine that you will monitor the reaction progress by TLC. Will the product be the higher or lower spot? What is the significant difference between 9-fluorenone and 9-fluorenol that allows reaction progress to be monitored by TLC?