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1)The half-cell, Tl | Tl+(1 mol L?1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on the next page. (1A) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (1B) (5 marks) What is the pH in the Pt | H+ | H2 half-cell? (1C) (3 marks) What is the value of the equilibrium constant for the reaction occurring in this cell?
In the photosythesis process sugars are produced during the reaction of carbon with water Assuming air is composed of 0.030% carbon dioxide calculate the volume of air required at reference conditions to produce 1.0kg of sugar.
What is the minor product? Explain why the one product is formed preferentially over the other. What reaction conditions can you change to favor the formation of the minor product?
The density of a 0.438 solution of potassium chromate at 298 is 1.063 .Calculate the vapor pressure of water above the solution. The vapor pressure of pure water at this temperature is 0.0313 . Assume complete dissociation.
2.0 moles of a gas was collected in the lab at a temperature of 1.1 degrees C and a pressure of 9.5 atm. What volume will the gas occupy under these conditions.
Calculate the mass percent of copper(II) sulfate pentahydrate in the recovered sample.
Water has vapor pressure of 23.8 torr at 25 degrees celsius. Find vapor pressure of water at 40 degrees celsius if delta H of vaporization is 40.7 KJ/mol.
Boron has two naturally occurring isotopes, 10B (19.9%)and 11B (80.1%). Although the B2 moleculedoes not exist naturally on Earth, it has been produced in the laboratory and observed in stars. (a) How many differentB2 molecules are possible? (b) W..
Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ) the standard enthalpy change ?Hº for the reaction written below, using the bond energies given.
At 2000°C the equilibrium constant for the reaction is Kc = 2.4 103. 2 NO(g) N2(g) + O2(g) If the initial concentration of NO is 0.100 M, what are the equilibrium concentrations of NO, N2, and O2? A) [O2] _ M B) [N2] _ M C) [NO] _ M
The temperature dependence of the vapor pressure is given by the equation: Ln p = Ln A - deltaH(vapor)/RT. Where p = pressure, T = temperature, A = pre-exponential constant, and delta h (vapor) is the enthalpy of vaporization. Solve for vapor pres..
what is the Maximum amount of aspirin possible if salicylic acid is the Limiting Reagent? (2.0013g salicylic acid)(3.09 mL acetic anhydride)(2.142 mass of aspirin synthesized)
You add 1 mL of 1 M HCl to the buffer. Calculate the molarity of H30+ added as HCl, and the final molarities of acetic acid and acetate ion at equilibrium. What is the new value of pH?
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