1) Using the reduction potentials table in the notes/book, what is the standard cell potential for the following electrochemical cell:

Al(s) | Al³⁺(aq) || Ni²⁺(aq) | Ni(s)

2) Using the standard reduction potentials table in your book/notes, what is the standard change in gibbs free energy for the following reaction in kJ?

2NO₃^-(aq) + 8H⁺(aq) + 3Cu(s) → 3Cu²⁺(aq) + 2NO(g) + 4H₂O(l)

3) A voltaic cell is set-up with a silver electrode in a silver nitrate solution and a nickel electrode in a nickel (II) nitrate solution. What is the reaction occuring at the anode? Use the reduction potentials table in the notes/book.

Experiment: Combinatorial Synthesis of Azo Dyes

Experiment Overview:

in this experiment parallel synthesis on two different kinds of dye molecules. the first dye is made usign aminobenzensulfonic acid and the other is 4-nitroaniline. Both molecules require a two step synthesis which involves diazotiation reaction combined with azo coupling to synthesize an azo dye.

1. Write the mechanism for diazonium salt and salicylic acid

2. What is green chemistry?

3. WHat solvents are considered green solvents?

1) A student performed this experiment with a watch glass that has a area of 956,667,666,076,834.6 nm². If the area of a stearic acid molecule is 0.21 nm² and it took 0.0000021 grams of stearic acid to form the monolayer, what is his approximate value for Avogadro's number? Molar mass of stearic acid is 282 g/mol.

2) A student calibrated a dropper and found that it delivered 1.00 ml of solution in 57 drops. If it took 5 drops to form his monolayer, and the stearic acidconcentration was 1.76 g/L, what mass (g) of stearic acid was in his monolayer?

3) If a watch glass has an area of 86.11 cm², what is its area in nm²?

4) A watch glass has a radius of 5.35 cm. What is the area of the watch glass in cm²?

5) If a student has a crystal with 818,795,544,682,724,600,000,000 molecules of iodine, what mass (g) of iodine does she have?

6) A student massed 22.65 grams of elemental iron. How many moles (mol) of iron does this represent?

7) When converting from mass in grams to moles it is necessary to divide by what? a)atomic number b) molar mass c) Avogadro's number d) the number of atoms in a mole

8) A student fills a balloon with air, to a volume of 20.0L. If it took 529,841,802,202,048,000,000,000 molecules of air to fill the balloon how many moles (mol) of air does that equal?

9) Avogadro's number is equal to what, and it represents what? a) 6.022e23, atoms in a molecules b) 6.022x10²³, atoms in a gram. c)6.022x10²³, atoms and/or molecules in a mole. d)6.022x10^-23, atoms and/or molecules in a mole.

The equilibrium constant, K, for the following reaction is 7.00×10-5 at 673 K.

NH4I(s) <----> NH3(g) + HI(g)

An equilibrium mixture of the solid and the two gases in a 1.00 L flask at 673 K contains 0.308 mol NH4I, 8.37×10-3 M NH3 and 8.37×10-3 M HI. If the concentration of NH3(g) is suddenly increased to 1.50×10-2 M, what will be the concentrations of the two gases once equilibrium has been reestablished?

[NH3]=

[HI]=

assuming 80 mg of vitamin C present in 29.57 ml of the orange juice, how many millileters of 0.0102 M KIO3 would be required to reach the stoichiometric point? i dont want just an answer, i want to know how to do it too. thanks!

Show and explain each step (neatly in complete sentences), indicate units, and specify the correct number of significant figures. A friend wants to sell you a catalyst that allows benzene to be formed by passing H2 (g) over graphite at 25 ˚C and 1 atm. Should you buy? Explain.

Terminology: 1.Thickness of internal coating of an analytical column (meaning, the purpose and the range of them (in um) 2.Carrier gas in GC and Eluent in LC ( general purpose, what is the general carrier media, gas or eluent, for GC amd LC 3. Isocratic and gradient program of HPLC 4. FID detector (full name, flow of the gases for flame, best use for what compounds)

Calculate the Kovats retention index for an unknown using the following retention times: 1.8 min for CH4, 11.7 min for octane, 14.4 min for the unknown, and 18.5 min for nonane.

A)Buffer capacity has a rather loose definition, yet it is an important property of buffers. A commonly seen definition of buffer capacity is:

A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.18 solution.

A 0.300 g sample of an aspirin tablet is used to prepare 100.0 mL of a stock solution by dissolving the tablet in 1 M NaOH then diluting with distilled water to the 100 mL mark of a volumetric flask.  A 0.30 mL sample of the stock solution is then transferred to a volumetric flask and diluted with 0.02 M iron(III) chloride to the 10.00 mL mark.  The tetraaquasalicylatoiron(III) complex concentration in this 10.00 mL sample is determined to be 4.3x10^-4M.  What is the percentage of acetylsalicylic acid in the original aspirin tablet?  Do not include the % sign in your answer.  For example, for a value of 100% enter 100.

Would really like a step by step answer. So i can understand the process.

Phathalic acid, H2C8H4O4, is a diprotic acid and has a concentration of 2.9 M. Ka1 = 0.0012 and Ka2 = 3.9 x 10-6. Estimate the concentration of [HC8H4O4-] and [C8H4O4-2] at equilibrium. Determine Kb1 and Kb2. Determine the pH of the solution at each proton dissociation. 11. Calculate the molar solubility of calcium hydroxide (Ksp = 4.8 x 10^6 I NEED TO KNOW HOW DID THEY GET THIS ANSWER PLEASE 0.0012 = x2/2.9 x = 0.059 M equilibrium concentration of HC8H4O4- = 0.059 M

A student prepared the three solutions listed in the table using graduated pipettes. Determine the initial molarities of H₂O₂ in each of the 3 solutions to the correct sig figs.

Phosphoric acid is a triprotic acid, so H3PO4, H2PO4 ^-, and HPO4 ^2- are all acids. Which of the solutions below would have the lowest pH?

0.1 M NaH2PO4
0.1 M Na2HPO4
0.1 M Na3PO4