QUESTION #1:

Carbon monoxide and chlorine gas react to form phosgene:
CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K

If a reaction mixture initially contains 321 torr of CO and 157 torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?

QUESTION #2:

Calculate the concentration of all species in a 0.150 M solution of H2CO3

[H2CO3], [HCO−3], [CO2−3], [H3O+], [OH−] = _____?_____

QUESTION #3:

Write the formula for the conjugate base of each of the following acids expressing the answer as a chemical formula: HNO2, H3PO4, HCHO2, HF

Be sure to answer all parts. The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal: CO(g) + H2O(g) ⇌ CO2(g) + H2(g) A study was made in which equilibrium was reached with [CO] = [H2O] = [H2] = 0.100 M and [CO2] = 0.400 M. After 1.40 mol of H2 is added to the 2.00−L container and equilibrium is reestablished, what are the new concentrations of all the components?

Be sure to answer all parts. Phosgene (COCl2) is a toxic substance that forms readily from carbon monoxide and chlorine at elevated temperatures: CO(g) + Cl2(g) ⇌ COCl2(g) If 0.470 mol of each reactant is placed in a 0.500−L flask at 600 K, what are the concentrations of all three substances at equilibrium (Kc = 4.95 at this temperature)?

1 - For the insoluble salt lead (ii) phosphate Pb₃(PO₄)₂, the solubility product, Ksp is 3.10x10^-44

a- Write the chemical equation and solubility product expression for Pb₃(PO₄)₂

b- Determine the molar solubility (M) of Pb₃(PO₄)₂

c- Identify wheather the molar solubility of Pb₃(PO₄)₂ will increase or decrease upon the following changes and explain why?

*** The ddition of 0.10 M Pb(NO₃)₂

*** The addition of 0.10 M NaCl

Phosphorus pentachloride decomposes according to the chemical equation

PCl5 <-----> PCl3 + Cl2

Kc=1.80 at 250 °C

A 0.135 mol sample of PCl5(g) is injected into an empty 2.15 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.

Calculate the standard deviation of the following set of measured values: 3.15,3.21,3.18,3.30,3.25,3.13,3.24,3.41,3.13,3.42,3.19

I calculated it but my answer was incorrect. Can you please do this problem and show the work step by step. I need to see where I went wrong. Thank you so much.

The reversible chemical reaction A+B⇌C+D has the following equilibrium constant: Kc=[C][D]/[A][B]=5.4

PART A:

Initially, only A and B are present, each at 2.00 M . What is the final concentration of A once equilibrium is reached?

Express your answer to two significant figures and include the appropriate units.

PART B:

What is the final concentration of D at equilibrium if the initial concentrations are [A] = 1.00 M and [B] = 2.00 M ?

Express your answer to two significant figures and include the appropriate units.

Thanks!

Tartaric acid (“H₂Tart”, M.W. = 176.13) is a diprotic acid that is important in food preparation. (See McMurray & Fay Appendix C for its Ka values.) A solution of tartaric acid is produced by dissolving 2.90 g of H₂Tart in 1.000 L of water. What are the equilibrium concentrations of H₂Tart, HTart^-, Tart^_2-, and H⁺ in this solution?

Phosphorus pentachloride decomposes according to the chemical equation. A 0.135 mol sample of PCl5(g) is injected into an empty 2.15 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.

Please explain this thermodynamics answer to the question.

Q: What is the requirement for a single phase system to be stable with respect to phase separation?

A: No combination of separated phases has a lower Gibbs free energy. In binary systems it means that the curvature of G with respect to concentration is positive everywhere.

The spherical volume of a H2O molecule is 0.00818 nm3 (in reality, this is a very close approximation of the volume of a H2O molecule). How long a "chain" would a 0.65 of a mole of water molecules be?

Calculate the isoelectric point of the following amino acid – You must show your work! pKa of the following groups α-COOH has 2.09 α-NH3 has 9.82 R group has 3.86 Aspartate

Briefly explain the principle of SDS-polyacrylamide gel electrophoresis. What is the purpose of the SDS? Which proteins midrate slowest by SDS-PAGE?

Part A: How acidic would the external pH need to become in order to make it possible to synthesize one ATP molecule from the energy delivered when one proton enters the mitochondrial matrix? (Assume ATP formation requires 52.0 kJ/mol, 37 degrees celsius, membrane potential -0.12V, and matrix pH 7.2)

Part B: Comment on whether this pH is feasible, BE SPECIFIC!

Consider the structural changes that occur in the following molecules. BH3, CH4, NH3, H2O, HF

a. according to Lewis and VSEPR theory, why doe these changed occur?

b. what are the ideal bond angles for each structure, and which are expected to be distorted?