Given the E⁰ values of the following two half-reactions:

Zn à Zn²⁺ + 2e^-               E⁰ = 0.763 volt

Fe à Fe²⁺ + 2e^-                E⁰ = 0.441 volt

a)Write a balanced complete oxidation-reduction reaction?

b)Explain whether the corrosion of an iron pipe (i.e., Fe Fe²⁺) in the presence of Zn/Zn²⁺ is possible or not (thermodynamically)?

c)Explain whether or not Zn will protect the corrosion of iron pipe if metallic Zn is in contact with the iron pipe?

In a experiment, 1 ml of .01 M KMnO4 plus 6 drops of 6 M H2SO4 are added together with drops of 0.1 M FeSO4 until change occurs. The color changed from purple to a clear solution. What is the oxidizing agent and reducing agent ? The balanced net ionic equation with 1/2 reactions? Thank you.

Based on material science and diffusion, how is beef marinated? This question was given by my professor as a way to apply diffusion to the real world and if you can give me a basic understanding that would be awesome. Thank you.

Given the following pairs of half-reactions, please construct a complete balanced oxidation-reduction reaction for each pair of two half-reactions:

a) H₂= 2H⁺ + 2e^-

Fe²⁺= à Fe³⁺ + e^-

b) 1/4O₂(g) + H⁺+ e- == ½ H₂OH₂ =à 2H⁺+ 2e^-

   ^C) 2IO₃^-+ 12H⁺+ 10e^-== I₂+ 6H₂O 2I^-= I₂+ 2e^-

Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 3.69-M NaOH is added to 530. mL of each of the following solutions.

a.) water

pH before mixing: 7.00 (correct)

pH after mixing: ??

b.) 0.180 M NH₃

pH before mixing: 11.26

pH after mixing: ??

Thank you! Sincerely, a confused college student

State the dominant intermolecular forces for the following substances:

iron(III)chloride

phosphorous trichloride

boron trichloride

BeH₂

H₂O

XeF₂

PH₃

CrCl₃

SF₂

CS₂

Calculate the pH of each of the solutions and the change in pH to 0.01 pH units caused by adding 10.0 mL of 3.63-M HCl to 440. mL of each of the following solutions.

a.) .181 M C2H3O2 1-

ph before mixing: 9.00 (correct)

pH after mixing: ??

b.) a buffer solution that is 0.181 M in each C2H3O2 1- and HC2H3O2

pH before mixing: ??

pH after mixing: ??

Thank you!! Sincerely, a confused college student

A mixture of carbon dioxide and nitrogen gases, in a 7.69 L flask at 36 °C, contains 10.4 grams of carbon dioxide and 7.77 grams of nitrogen. The partial pressure ofnitrogen in the flask is (?) atm and the total pressure in the flask is (?) atm

thanks in advance

You have 200 ml of 0.1M HEPES buffer, pH 7.5. You add 2 ml of 0.4M HCl. The pKa of HEPES is 7.5.

a) what will the resulting pH be?

b) what would the pH be if no HEPES were present (that is, you mixed water and HCl)?

Determine the pH at the equivalence point when 0.05 M KOH is titrated with 50.0 ml of 0.01 M benzoic acid HC₇H₅O₂. The K_a for benzoic acid is 6.3 x10^-5.

Physical Chemistry problem:

How does the confinement of a particle to a finite region of space lead to the quantization of its energy? You may use any combination of words, images, or equations to support your answer.

calculate the molar solubility of of Ag2CO3 in a solution that is buffered to a phone of 7.50

Carbohydrates:

what is the difference in monosacchrides, disaccharides, and polysacchrides?

What are the structures of glucose, frustose, sucrose, lactose, and starch, such that you could predict their responses in the following tests:

Benedicts test (remains bright blue if negative for a reducing sugar, turns any other color if positive for reducing sugar. Tests for free or potentially free aldehyde or ketone groups)

Seliwanoff’s Test (turns red or pink, speed of color change indicates ketose vs. aldose, and monosacchride vs. disaccharide)

Iodine Test – tests for polysaccharides, turns blue-black in starch, red-to-brown color in other polysaccharides

A reaction was run with two different initial concentrations of reactants A and B:

What is the order of the reaction with respect to B?

A reaction was run with two different initial concentrations of reactants A and B:

What is the order of the reaction with respect to B?

Fermentation Test – if we sketch the fermentation tube, what are the expected results?

Hydrolysis of di- and polysaccharides – can disaccharides and polysaccharides undergo hydrolysis? (YES!!) How did the tests you conducted support your answer?