Determine the pH of each of the following solutions.

Part A

0.24 M KCHO2

Express your answer to two decimal places.

Part B

0.22 M CH3NH3I

Express your answer to two decimal places.

Part C

0.21 M KI

Express your answer to two decimal places.

define and provide expamples for each of the following

1) qualitative photochemistry

2) quantitative photochemistry

What volumes (in mL) of 1.0 M triethanolamine and 1.0M HNO3 is required to prepare 1.0L of pH 7.76 buffer using triethanolamine that is 0.020 M in both triethanolamine and triethanolammonium ion?

4. Under each of the following conditions, please predict the effect the mutation will have on the rate at which glycolysis will proceed in liver cells:

a. Loss of the allosteric site for ATP in phosphofructokinase

b. Loss of binding site for citrate in phosphofructokinase

c. Loss of the phosphatase domain of the bifunctional enzyme that controls the level of fructose 2,6-bisphosphate

d. Loss of the binding site for fructose 1,6-bisphosphate in pyruvate kinase.

Consider the following equilibrium:
N2O4(g)?2NO2(g)
Thermodynamic data on these gases are given in Appendix C in the textbook. You may assume that ?H? and ?S? do not vary with temperature.

Part A At what temperature will an equilibrium mixture contain equal amounts of the two gases? Express your answer using four significant figures

Part B

At what temperature will an equilibrium mixture of 1 atm total pressure contain twice as much NO2 as N2O4?

Express your answer using four significant figures.

Part C

At what temperature will an equilibrium mixture of 9 atm total pressure contain twice as much NO2 as N2O4?

Express your answer using four significant figures.

Part D

Rationalize the results from parts B and C by using Le Chatelier's principle (Section 15.7 in the textbook).

Why do bubbles rise to the surface of Guinness slower than they rise to the surface of a light beer? (The beers are of very similar viscosity).If you poured the two beers very carefully into the same glass what would you expect to see?

In the balanced equilibrium reaction: 2 H2S <----> S2 + 2 H2, with K = 3.7 x 10-6, if the initial concentration of H2S is 0.080 M, what is the final concentration of H2?

How many grams of solute are in each of the following solutions?

0.437 L of a 0.350 M K2CO3 solution =

15.5 mL of a 2.50 M AgNO3 solution =

25.2 mL of a 6.00 M H3PO4 solution =

Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.120 M HClO(aq) with 0.120 M KOH(aq). The ionization constant for HClO can be found here. (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 40.0 mL of KOH (d) after addition of 50.0 mL of KOH (e) after addition of 60.0 mL of KOH

A solution of HCl is prepared by diluting 25.0 mL of a 1.0 M HCl solution with enough water to make 750 mL of HCl solution. (Show your work for all calculations!)

a) What is the molarity of the HCl solution?

b) What is the [H3O+] and the pH of the HCl solution?

c) Write the balanced chemical equation for the reaction of HCl and Ba(OH)2

d) How many milliliters of the diluted HCl solution is required to completely react with 350 mg of Ba(OH)2?

What is the change in enthalpy (in kJ) under standard conditions when 33.75 g of lithium hydroxide dissolves in water? What is the change in enthalpy (in kJ) under standard conditions when 26.58 g of potassium hydroxide dissolves in water? What is the change in enthalpy (in kJ) under standard conditions when 181.37 g of sodium sulfate dissolves in water?

Find ΔE° for the reaction below if the process is carried out at a constant pressure of 1.00 atm andΔV (the volume change) = -24.5 L. (1 L ∙ atm = 101 J)
2 CO(g) + O₂ (g) → 2 CO₂(g) ΔH° = -566. kJ

Select one:

A. +2.47 kJ

B. -568 kJ

C. -2.47 kJ

D. -564 kJ

What is implied by the term “superaromatic”, as applied to the reactivity of ferrocene toward electrophilic aromatic substitution? How can this be used to explain the fact that no Lewis acid catalyst is required during the Friedel-Crafts acylation of ferrocene?   

Describe how you may synthesize the following block copolymer (PMMA-b-PS)? Please describe the following details: what initiator(s) should be used, and what is its concentration with respect to monomer concentrations (suppose [MMA] = [Styrene] = 1.5 M)? How do you want to add the monomers in the reactor?

Radiation can be used for chemical reactions, principally to break bonds between atoms. From the list below identify the bond with the highest energy that can be broken by a photon of 1.17×1012 kHz frequency.

(a) H-H: 432 kJ/mol

(b) F-F: 159 kJ/mol

(c) H-F: 565 kJ/mol

(d) C-H: 413 kJ/mol

(e) O-H: 467 kJ/mol