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A 500ml Buffer solutin is 0.150 M in HNO2 and 0.175 M in KNO2. The Ka for HNO2 is 4.6*10^-4. What is the inital pH of this buffer? What is the pH of the buffer in the question above if 0.0049 moles of HCl are added assuming no change in volume?
A student added calcium ion, ca2+ to an aqueous solution and observed formation of a precipitate. Addition of HNO3 had no effect on the precipitate. What anion wa present in the original solution? Explain your answer
If we have a solution that contains 0.022 M Calcium and 0.014 Magnesium and we have to use potassium hydroxide to selectively precipitate one of the ions, while leaving the other ion in the solution.
What affect would an increased concentration of 2,3-BPG have on the oxygen-binding curve for hemoglobin. Why would this adaptation be beneficial for functioning well at high altitude?
State the chemical reaction that took place in the patient's body.
calculate the difference between the Gibbs free energy and Helmholtz free energy for this reaction at normal temperatures and pressures.
Using an aqueous solution of Ba(NO3)2 the density of this solution is measured to be 3.640g/ml and this solution containing barium nitrate mole fraction of 0.01704. compute the molarity of this solution?
Calculate the mass/volume percent, % (m/v), for the solute in each of the following solutions. Express the answer using 2 sig figures.
A tightly sealed 5.0 L flask contains argon at 85.2 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas
orbits around a definite point in space made of neutrinos and electrons D) is not a definite point in space, but rather it is a cloud of smaller particles called quarks that deflect alpha particles
A fossil fuel containing 84% C, 15% H and 1%S is burned with 20% excess air in a boiler. The stack gases are at 150 C. a) What is the concentration (ppm) of SO3 in the stack if equilibrium is established according to
Which solution would increase the osmotic pressure of water the most?
Calculate the standard reduction potential and standard apparent free energy change for the transfer of a pair of electrons from FADH2 to 1/2O2. Show all calculations.
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