(a) What are the disadvantages of using too little drying agent? (b) What are the disadvantages of using too much drying agent?

A Carnot cycle uses 1.00 mol of a monoatomic perfect gas as the working substance from an initial state of 10.0 atm and 600 K. It expands isothermally to a pressure of 1.00 atm (step 1), and then adiabatically to a temperature of 300 K, (step 2). This expansion is followed by an isothermal compression (step 3), and then an adiabatic compression (step 4) back to the initial state. Determine the values of q, w, ÄU, ÄH, ÄS, and ÄSsurr for each step in the cycle and the cycle as a whole. (Express your answer as a table of values). Calculate the efficiency of an energy that uses this cycle. Actually, do this calculation two different ways and see if they agree with each other.

Calculate the pH of a titration with 25 mL of 0.1 M NH3 with 0.1 MHCl at the following volume points: 0, 10, 24.9, 25, 25.1, 40,50 mL

Calculate pCa2+ for the titration of 25.00 mL of 0.0200 M EDTA with 12.0 mL of 0.01000 M CaSO4 at pH 10.00.

In a FRET experiment, the donor GFP (GFP absorbs at 487 nm, emits at 510 nm) is attached to protein A, and the acceptor YFP (YFP absorbs at 514 nm, emits at 535 nm) is attached to protein B. The value of ro is 10Å. a. If protein A does not bind to protein B, fluorescence will be observed at what wavelength b. At pH 6, the distance between the proteins is 25 Å. What is the efficiency? c. Increasing the pH from 6 to 12 causes the efficiency to increase to 0.9. Calculate the separation distance at pH 12.

In theory, what could be done experimentally to change the value of A (frequency factor in Arrhenius equation)? Explain the effect in molecular terms.

1.   A solution of 0.05M KMnO₄ was titrated with a solution of 0.268g Na₂C₂O₄ 100mL. What is the volume of KMnO₄ required to the end point?

2.   Calculate the % C₂O₄^2- in each of the following :-

a.   Na₂C₂O₄

b.   K₂[Cu (C₂O₄)₂].2H₂O

how does the flouride-ion selective electrode detect the flouride ion?

The activation energy for a particular reaction is 84 kJ/mol. By what factor will the rate constant increase when the temperature is increased from 50 oC to 72 oC?

1.(15):Define

Partition function

Equipartition principle

How the energy of a system can be gotten from the partition function.

Quantum mechanical tunneling

Continuous function

Determine the percent ionization of the following solutions of phenol at 25 degrees Celsius.

a) 0.681 M

b) 0.250 M

c) 1.68 x 10^-6 M (enter answer in scientific notation)

c. For this reaction in heart muscle, ΔG°’ = +4.7 kJ/mol but ΔG = -0.6 kJ/mol. i. Explain, in words, how ΔG can be negative when ΔG°’ is positive. ii. What would be the ratio of 3PG to 2PG if the reaction were at equilibrium at 25°C? iii. What is the actual ratio of 3PG to 2PG in heart muscle (T = 37°C)?

The 12 green principles concern safety for people and the environment; would it be greener to use a bunsen burner or a hot plate?

1. View the side groups in the model, with attention to the water channel. What do the numerous aromatic rings on the surface of the channel suggest about the chemical properties of the channel?

2. Conserved histidine, asparagine (blue), and cysteine (yellow) residues are present on the surface of the water channel. Which of the following is LEAST likely to hydrogen-bond with a water molecule?

3. What prevents glycerol from passing through the water channel?

4. Aquaporins allow water to pass through the channel but prevent other solutes and ions from also crossing the membrane. Protons can move with water using the same hydrogen bonding facillitated movement. What PREVENTS protons from passing through the water channel?