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?

Calculate the concentration of all species present in a 0.01 M aqueous solution of ammonia. The pKa of the ammonium ion is 9.24.

A.)Calculate [H⁺] (express the result in molar units using three significant figures and scientific notation).

B.)Calculate [OH^-] (express the result in molar units using three significant figures and scientific notation).

C.)Calculate [NH+4]  (express the result in molar units using three significant figures and scientific notation).

D.)Calculate [NH3]  (express the result in molar units using three significant figures and scientific notation).

E.)What is the pH of the solution?

Here's the measurements from my expirement.
(reaction 1)
0.502 g Cu (s)
4.0 mL HNO3
100 mL DI water

(reaction 2)
30 mL 3.0 M NAOH

(reaction 3)
nothing was added.

(reaction 4)
200 mL of DI water
15 mL of 6.0 M HCl

(reaction 5)
2.003 g Zn
10 mL 6M HCl
5 mL methanol
5 mL DI water
43.492 g mass of evaporating dish
44.549 g mass of evaporating dish with solid

Here are the reactions:
reaction 1: theoretical mass of copper (II) nitrate formed
Cu+4HNO3-->Cu(NO3)2+2NO2+2H2O

reactoin 2: theoretical mass of copper (II) hydroxide formed
Cu(NO3)2+2NaOH-->Cu(OH)2+2NaNO3

reaction 3: theoretical mass of copper (II) oxide formed
Cu(OH)2-->CuO+H2O

reaction 4: theoretical mass of copper (II) sulfate formed
CuO+H2SO4-->CuSO4+H2O

reaction 5: theoretical mass of copper formed
Zn+CuSO4-->ZnSO4+Cu

Can somebody show me how to work the first one at least, so then maybe I can figure the rest out. I just do not know where to start.

The values of specific gravity are:

Standard Sugar Solution # 1= 1.014

Standard Sugar Solution # 2= 1.028

Standard Sugar Solution # 3= 1.042

Show your calculations below.

3. Plot data points of the 3 standard sugar solutions on a graph. Include the data point for distilled water. Then draw the calibration graph. Label the x-axis & the y-axis.

Y acess: 1.05 1.04 1.03 1.02 1.01 1.00 0.99 X acess: 0 , 2, 4, 6, 8, 10, 12

4. Determine the sugar concentration for Coke & Gatorade by using your calibration graph. Indicate on the calibration graph how you determine the concentrations of each solution.

Information recorded in the lab experiment:

Part C: Specific gravity of sugar solutions:

Standard Sugar Solutions/ Mass of Sugar/ Voume of Solution/ Specific Gravity

#1 / 18.00g / 500.0mL / 1.014

#2 / 36.00g / 500.0mL / 1.028

#3 / 53.00g / 500.0mL / 1.042

Part B: Specific gravity of soft/sports drinks:

Solution / Specific Gravity

Coke / 1.049

Gatorade / 1.024

5. Using the information (Sugar content and Serving Size) on the nutrition label of each drink, determine the concentration of sugar in each drink. Show your calculations.

6.Calculate the absolute errors of measured sugar concentrations by using the values determined in the previous problem as reference values

PLEASE HELP!