How much energy per mole is required to transfer acetic acid, a byproduct of ethanol metabolism from blood to urine. The relevant concentrations are 39.00 and 742.00 ppm respectively and you are running a fever at 39oC. State your answer in kJ/mol. (Donnan Potential Question)

EDIT: ITS ASKING FOR HOW MUCH ENERGY IN KJ/MOL IS NEEDED TO TRANSPORT ACETIC ACID FROM BLOOD TO URINE.

How might you use 2,4-dinitrophenylhydrazine to determine if the crude product obtained from the Grignard reaction between phenyl magnesium bromide and benzaldehyde contains unreacted benzaldehyde as an impurity? Use an equation to illustrate your explanation and describe what you would expect to observe.  

How and where does lactose undergo digestion in the body. Name the products.

A gas cylinder is filled with 211 torr of N2 and 615 torr of F2 and the resulting reaction forms NF3 at constant temperature and volume. N2(g) + 3 F2(g) ⎯→ 2 NF3 (g). What is the total pressure, and what are the Mole Fractions of each gas, after the reaction? (Hint: think ICE) Total Pressure at the end of Rxn: _______________ Mole Fraction of N2 = ___________ F2 = __________ NF3 = ____________

If 0.30 M HCOOH (weak acid) is prepared, what will be the hydronium ion concentration at equilibrium at 25

1. Z-2-chlorocyclopentanol and E-2-chlorocyclopentanol each react with NaOH to eliminate HCl but they give different final products C5H8O. Show how each forms

2. The reactions of bromotrichloromethane with toluene in the presence of a peroxide affords trichloromethane and benzyl bromide. Show the mechanism, indicating the chain carrying and initiating steps

3.

Show how to convert 2-hydroxypropane to 1-hydroxypropane:

(a) Using BH3 at some point

(b) Not using BH3

4.

Show the products of the reaction of Br2 with cis-2-butnene (Z) and with trans-2-butene (E). Show and them any enantiomers formed.

(a) in pentane (b) in water, forming bromoalcohols

The three-dimensional structure of the potassium channel provided a rationale for the selectivity of potassium ions and the rejection of sodium ions. Which of the following is the basis for the ability of the potassium channel to discriminate between these two ions?

The sodium ion is too small to pass through the channel.

The opening of the channel is structurally arranged such that potassium ions can bind, but is too small for sodium ions.

A restriction in the channel allows for potassium ions to be resolvated by protein ligands but is too large to effectively resolvate sodium ions.

The restriction of the channel desolvates sodium ions but not potassium ions.

Which of the following contain a coordinate covalent bond?

Check all that apply.

Check all that apply.

Using a 0.20 M phosphate buffer with a pH of 7.4, you add 0.71 mL of 0.54 M HCl to 59 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.)

Using a 0.20 M phosphate buffer with a pH of 7.4, you add 0.71 mL of 0.54 M NaOH to 59 mL of the buffer. What is the new pH of the solution (Enter your answer to three significant figures.)

Ammonia, NH3, is a weak base with a Kb value of 1.8×10−5.

Part A

What is the pH of a 0.270 M ammonia solution?

Part B

What is the percent ionization of ammonia at this concentration?

1, Why use ninhydrin reagent and iodine crystals as visualizing agent in TLC?

2. Differentiate TLC and Column Chromatography based on a) separation of components in mobile and stationary phases b) solvent mitigation c) type of support used

A manufacturing facility requires saturated steam at 120°C at a rate of 1.2 kg/min. Design an electric steam boiler for this purpose under these constraints: • The boiler will be in cylindrical shape with a height-to diameter ratio of 1.5. The boiler can be horizontal or vertical. • A commercially available plug-in type electrical heating element made of mechanically polished stainless steel will be used. The diameter of the heater can be between 0.5 cm and 3 cm. Also, the heat flux at the surface of the heater cannot exceed 150 kW/m². • Half of the volume of the boiler should be occupied by steam, and the boiler should be large enough to hold enough water for a 2-h supply of steam. Also, the boiler will be well-insulated. You are to specify these: (1) The height and inner diameter of the tank; (2) the length, diameter, power rating, and surface temperature of the electric heating element; and (3) the maximum rate of steam production during short periods (less than 30 min) of overload conditions, and how it can be accomplished

A. draw all the possible stereoisomers for 1-bromo-1,4-dimethylcyclohexane and identify the relationship of the pairs of isomers to each other.

B. 1-bromo-1,4-dimethylcyclohexane reacts with methanol (CH3OH). Show the mechanism and products. Show stereochemistry of the products (if any). What is major product produced. Explain answer.

Using a 0.20 M phosphate buffer with a pH of 7.6, you add 0.76 mL of 0.45 M NaOH to 47 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.)