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The equations and constants for the dissociation of three different acids are given below. HCO3- ? H+ + CO32- Ka = 4.2e-7 H2PO4- ? H+ + HPO42- Ka = 6.2e-8 HSO4- ? H+ + SO42- Ka = 1.3e-2 1. From the systems above, identify the conjugate pair that is best for preparing a buffer with a pH of 7.2. Explain your choice. 2. Explain briefly how you would prepare the buffer solution described in (a) with the conjugate pair you have chosen. 3. If the concentrations of both the acid and the conjugate base you have chosen were doubled, how would the pH be affected? Explain how the capacity of the buffer is affected by this change in concentrations of acid and base. 4. Explain briefly how you could prepare the buffer solution in (a) if you had available the solid salt of the only one member of the conjugate pair and solution of a strong acid and a strong base.
Propane, C3H8, when used as a fuel, reacts with oxygen gas to produce carbon dioxide and water. What mass of oxygen will be required to react with exactly 14.05 grams of propane?
Determine the acid content of the vinegar as wt % CH3COOH, acetic acid
What is the empirical formula for the hydrocarbon?
You use 27.5 mL of NaOH to titrate 100.0 mL of HCl and 18.4 mL of NaOH to titrate 50.0 mL of 0.0782 M H2SO4. What are the concentrations of the HCl and NaOH respectively?
(a)how do I calculate the concentration of the lycopene solution in the spectrophotometer cell before isomerization, given that the molar absorptivity of lycopene at 471 nm is 1.86 x 10^4. (b) Calculate the mass of lycopene in 3.0mL of the solutio..
Find delta H for HCl(g) given H-Cl bond enthalpy = +431 kJ·mol-1;
A 1 L solution of 1.5 M acetic acid and 1.5 M sodium acetate has a ph of 4.74. 10 ml of 0.1 M NaOH were added to the solution followed by the addition of 50 ml of 0.02 M HCl.
In a seperate trial the student puts 214 mL of the same liquid into the same flask at the same conditions. What will the pressure measure (in kPa) in the second trial?
This experiment calls for the use of 2mL of 2-chloro-2methylpropane. The molar mass of 2-chloro-2methylpropane is 92.57g mol-1, and its density is 0.847g mL-1. 1) Calculate the number of moles of 2-chloro-2methylpropane used in this experiment.
A mixture of three gases, A, B, and C, is at a total pressure of 9.38 atm. The partial pressure of gas A is 1.88 atm and that of gas B is 2.32 atm. What is the partial pressure of gas C?
what is the appropiate mechanism for the radical polymerization of 1-butyne? show the polymerization of three units of 1-butyne.
When the liberated hydrogen gas is collected over water at 29 degrees celsius and 752 torr, the volume is found to be 343 mL. The vapor pressure of water at 29 degrees celsius is 30.0 torr. What is the mass percentage of aluminum in this alloy?
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