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1.The pKa of NH4+ is 9.25 at 25?C. The rate constant at 25?C for the reaction of NH4+ and OH- to form aqueous NH3 is 4.0*10^10 dm3 mol-1 s-1. Calculate the rate constant for proton transfer to NH3. What relaxation time would be observed if a temperature jump were applied to a solution of 0.15 mol dm-3 NH3(aq) at 25?C?
the system h2g i2g ?? 2 hig is at equilibrium at a fixed temperature with a partial pressure of h2 of atm a partial
you store the buffer in the fridge overnight (4 degrees). Calculate the pH of the buffer when you take it out of the fridge the following morning.
The variation of the atmospheric pressure p with altitude h is predicted by the barometric formula to be p = p0 e^(-h/H) where p0 is the pressure at sea level and H=RT/Mg with M the average molar mass of air and T the average temperature. Obtain t..
A sample containing 0.35 mol argon gas at a temperature of 13 C and a pressure of 568 torr is heated to 56 C and a pressure of 897 torr. A. What is the original volume of the gas? B. What is the new volume of the argon gas?
If 50 g of KNO3 is completely dissolved in 100 g of water at 70 degrees Celcius, is the solution saturated, unsaturated, or supersaturated?
Calculate the pH of a solution prepared by mixing 20.5mL of a 0.500M sodium fluoride solution with 32.5mL of a 0.750M hydrofluoric acid solution.
Why in this work-up procedure is ordinary not anhydrous ether used for rinsing the reaction. ask and to provide a satisfactory volume for the extraction.
How many grams of Potassium Chlorate decompose to passium chloride and 638mL of O2 at 128 degrees C and 752 Torr. 2KClO3 (s) => 2KCl (s) + 3O2(g)
what mass of water would need to evaporate from your skin in order to dissipate 1.7 times 105 j of heat from your body?
Draw three stable, acyclic isomers of C3H6O. Using wet chemistry, show how you can distinguish between these three compounds.
What mass of salicylic acid is needed to produce one extra strenght tablet of aspirin if the reaction has 60% yield. Please show work and correct sig figs.
4.5 g CH4(g) occupies 12.7L at 310K. Calculate the work, heat, energy, and enthalphy change upon expansion by 3.3L @p=constant. please show the equations used.
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