What is the pH of a 0.39 M solution of sodium oxalate, Na₂C₂O₄? Acid ionization constants for oxalic acid are K_a1 = 5.6 x 10^-2 and K_a2= 5.4 x 10^-5.

Draw the mechanism and label products and reactants for the synthesis of aniline to 4-Bromo-2-Chloroacetanilide:

Aniline + Acetic Anhydride --> Acetanilide + Acetic Acid

Acetanilide + Bromine --> 4-Bromoacetanilide

STEP 1: Hydrochloric Acid + Sodium Chlorate --> Chlorine + Water + Sodium Chloride

STEP 2: 4-Bromoacetanilide + Chlorine --> 4-Bromo-2-Chloroacetanilide

4-Bromo-2-Chloroacetanilide + Ethanol --> 4-Bromo-2-Chloroaniline + Ethyl Acetate

Show all lone pairs or formal charges.

Water Chemistry

Respond to the following questions: Consider the bonding and geometry of the water molecule.

A) How many bonds does Hydrogen typically form? How many bonds does Oxygen typically form?

B) What is the Chemical Formula for Water?

C) What type of bonds (ionic, covalent, and metallic) holds the atoms of the water molecule together?

D) Why is the water molecule a bent molecule?

E) What are some of the consequences of the water molecule being bent?

F) When water boils, what happens to the Hydrogen and Oxygen atoms within a water molecule?

G) Discuss a few things that you know about Water based upon your reading, activities, and personal experience. How much can you tell me about water?

Solutions of sulfuric acid and lead(II) acetate react to form solid lead(II) sulfate and a solution of acetic acid. 5.10 gg of sulfuric acid and 5.10 gg of lead(II) acetate are mixed.

A. Calculate the number of grams of sulfuric acid present in the mixture after the reaction is complete.

B. Calculate the number of grams of lead(II) acetate present in the mixture after the reaction is complete.

C. Calculate the number of grams of lead(II) sulfate present in the mixture after the reaction is complete.

D. Calculate the number of grams of acetic acid present in the mixture after the reaction is complete.

For the triprotic acid, H+glutamic acid, pK1=2.23, pK2=4.42 and pK3=9.95. If one has 0.10L of a 1.0E-2 M solution and titrates it with 0.255 L of a 1.0E-2 M KOH solution, what is the pH of the resulting solution?

The answer is 10.04. I just have no clue how to get there.

The Racah parameter B is 460 cm-1 in [Co(CN)6]3– and 615 cm-1 in [Co(NH3)6]3+. Consider the nature of bonding with the two ligands and explain the difference in the B value.

Explain in cohesive sentences the advantages of LC/MS over GC/MS

Estimate Keq for the following equilibria at 350 K. R = 8.3145 J/(mol*K). Substance ΔHo(kJ/mol) So(J/(mol*K)) SnO2(s) -577.6 49.0 H2(g) 0 130.680 CO(g) -110.5 197.7 Sn(s, white) 0 51.2 H2O(l) -285.83 69.95 Fe(s) 0 27.3 Fe3O4(s) -1118.4 146.4 Correct answer. Correct. SnO2(s) + 2H2(g) ⇄ Sn(s, white) + 2H2O(l) The number of significant digits is set to 2; the tolerance is +/-3% LINK TO TEXT Incorrect answer. Incorrect. 3Fe(s) + 4H2O(l) ⇄ Fe3O4(s) + 4H2(g) Entry field with incorrect answer now contains modified data The number of significant digits is set to 2; the tolerance is +/-3%

Construct flow charts (a.k.a. flow diagrams) to show how to separate each of the following pairs of water insoluble compounds: a) a carboxylic acid and a neutral compound (e.g., a hydrocarbon, R-H); b) a neutral compound and an amine; c) a phenol, a carboxylic acid and an amine (show two different flow charts for separation of this mixture).

Which gas would you expect to behave more like an ideal gas; HCl, H2O, or He? Why?

The bright-red color of highway safety flares comes from strontium ions in salts such as Sr(NO3)2 and SrCO3. Burning a flare produces strontium ions in excited states, which then emit red photons at 606 nm and several wavelengths between 636 and 688 nm. Calculate the energy (in Joules per mole) of the 643 nm emission.

We have a solution of protein that has a concentration of 0.25 mg/ml.

a.We need 20 g of the protein for an experiment. What volume of the protein solution do we need?

b.Suppose we want a solution containing 150 g of the protein at a concentration of 0.50 mg/ml. To do this we will first evaporate the liquid from enough of the protein solution to get 150 g. How much solution do we need to start with? How much H₂O do we add to get the desired concentration?

d.Suppose we want 1 ml of a 10 g/ml solution. How much H₂O and protein stock must we add to get this?

e.Suppose we want 100 l of a 0.1 g/l solution. How much H₂O and protein stock must we add to get this?

A solution of fructose, C₆H₁₂O₆, a sugar found in many fruits, is made by dissolving 38.0 g of fructose in 1.00 kg of water. What is the molal concentration of fructose the solution? What is the mole fraction of fructose in the solution? What is the mass percent of fructose in the solution? What is the molarity of the fructose solution if the density of the solution is 1.0078 g/mL?