For this assignment, the target compound that you should synthesize is benzyl methyl ether. This is a
substitution reaction. Examine the product and determine which bonds may be formed. Keep in mind the
substitution pattern of the product and the nature of the mechanism accommodated by this arrangement.

starting materials: benzyl chloride, ether, NaOMe

A. Approx TLC values of product and starting material

B. Write mechanism for this reaction

Calculate ?G?rxn and K for each of the following reactions.

Part A

The reaction of Cr2+(aq) with Cr2O2?7(aq) in acid solution to form Cr3+(aq).
Calculate ?G?rxn.

Part B

Calculate K.

Express your answer using two significant figures.

Part C

The reaction of Cr3+(aq) and Cr(s) to form Cr2+(aq). [The reduction potential of Cr2+(aq) to Cr(s) is -0.91 V.]
Calculate ?G?rxn.

Express your answer using two significant figures.

Part D

Calculate K.

Express your answer using one significant figure.

Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.5 L sample from the atmosphere at sea level (1.00 atm) on a warm day (27 ∘C), how many CO2 molecules are in your sample?

Based

Calculate , using the equipartition theorem, the constant-volume heat capacity of CO_2 in three cases:

a.) no vibrations active (the low-T limit)

b.) all vibrations active (the high-T limit)

c.) with just the lowest-energy vibration active.

Imagine an isolated, 10-liter cylinder containing one mole of ideal gas held in the left five liters of the cylinder by a piston, initially locked in place. The right half of the cylinder is evacuated; the entire system is maintained at constant temperature. When the piston is freed to move frictionlessly, we could track the motion of the piston and the volume in 1-liter increments. Calculate the change in entropy (in J mol^-1 K^-1) of the gas upon expansion after each of the five 1-liter increments. Demonstrate that the total entropy is indeed maximized when the expansion is complete. Make a table.

define polymers and how are they synthesized

Classify each compound as an acid, salt, base, oxide, binary molecular, or organic.

AlF₃                                        9. CCl₄                                   17. NO₂        

HNO₃                                      10. H₂SO₄                             18. NH₄Cl

NaNO₃                                   11. CuCl₂                              19. C₃H₇OH

N₂O₂                                       12. NH₄ClO₃                         20. NH₃

Ca(OH)₂                                 13. Sn(OH)₄                         21. CH₃CH₂CH₂CH₃

CH₄                                         14. ClO₂                                22. H₂O

NH₄OH                                   15. Na₂O                              23. (NH₄)₂O

Fe₂O₃                                      16. SiO₂                                24. HC₂H₃O₂

A compound has carboxyl group, an aminium group, and a guanidinium group. The pKas of the groups are 3.6, 9.7, and 12.8, respectively. A biochemist has 100 mL of a 0.10 M solution of this compound at a pH of 9.2. She adds 37 mL of 0.1 M HCl. To the nearest hundredth of a unit, what will be the pH of the solution after addition of the HCl (assume full stirring to reach a new equilibrium)?

Describe the preparation of 1L of a 0.1 M phosphate buffer at pH 8.0. The pKa for the buffer is 6.86

Dimethylamine, (CH3)2NH, is an organic base with pKb= 3.23at 298 K. In an experiment, a 40.0 mL sample of 0.105mol/L-1(CH3)2NH(aq)is titrated with 0.150mol/L-11HI(aq)at 298 K.

(a) Write a balanced chemical equation for the neutralization reaction upon which this titration is based, and indicate clearly which atom is being protonated. Then, calculate the equilibrium constant for the neutralization reaction. (Hint: To calculate the equilibrium constant, you may find it helpful to represent the neutralization reaction as the sum of twoor morereactions.)

(b) Calculate the pH, [(CH3)2NH], and[(CH3)2NH2+] at the following stages of the titration. Justify any approximations.

i) before the addition of any HI solution

ii) after the addition of 20.0 mL of HI solution

iii) at the equivalence point

iv) after the addition of 60.0 mL of HI solution

Quantitiy of limiting reagent= 13.5 mmols salicylic acid

Based on the quantity of the limiting reactant used above, what is the theoretical yield of the aspirin (acetalsalicylic acid) product, in grams?