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Compute the pH at the halfway point and at the equivalence point for each of the following titrations.
a. 100.0 ml of 0.10 M HC7H5O2 (Ka = 6-4x10^-5) titrated by 0.10 M NaOH
b. 100.0 ml of 0.10 M C2H5NH2 (Kb= 5.6x10^-4) titrated by 0.20 M HNO3
c. 100.0 ml of 0.50 M HCL titrated by 0.25 M NaOH
Consider a particle of mass, m, moving in a one dimensional system between x=a and x=b. Its potential energy is (1+(hbars)^2)/(mx^2). calculate the average value of x and x^2 for the particle in this system
What is the molar absorptivity of the unknown compound. What is the concentration of the compound in a solution, if the absorbance of the solution in a 1.00 cm cell at 520 nm is 0.320
Calculate the number of moles of HCl in the solution dispensed and its associated error.
When 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system
For each of the following equations, indicate the rate of change of all the other species relative to the rate of change of the underlined species
how many moles of calcium ions are in 1L of a 2.0M solution of CaCl2
she observed the formation of a large volume of precipitant while trying to dissolve copper sulfate in the irrigation water from the well on her farm (which contains high levels of hydrogen sulfide). What explanation can you provide for this obser..
How many moles of S8 are needed to make 0.600 moles of SF4? S8 + 8 Cl2 = 8 SCl2 ; 3 SCl2 + 4 NaF = SF4 + S2Cl2 + 4 NaCl
Predict the major and minor products of the following reaction. Name the products using systemic names. CH3CH2CH=CH2+H20->H+
The first four ionization energies of an element X are 0.58, 1.82, 2.74, and 11.58 MJ/mol. What is the most likely formula for a stable ion of X
If an intravenous solution containing 123 mg of a drug substance in each 250-mL bottle is to be administered at the rate of 200mcg of drug per minute,how many milliliters of the solution
A metal has crystallized with a face-centered cubic lattice. The edge of the unit cell is 366 pm. What is the diameter of the metal atom?
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