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The pI for amino acids (the pH of the isoelectric point) is exactly half-way between the pKa values of the two functional groups. Note that the aspartame has the carboxylic acid functionality of phenylalnine converted to an ester and the carboxylic acid of aspartic acid and linked as an amide to the amine group of phenylalanine. This leaves the aspartic acid amine group and the side chain carboxylic acid functional group of aspartic acid. Therefore aspartame will have an isoelectric point at a pH between the pKa values of these functional groups. Find the values for these two groups of aspartic acid and calculate a predicted pI value for aspartame.
Calculate the pH of a buffer solution formed by adding 28.75 grams of sodium lactate (NaC3H5O3) to 450.0 mL of 0.550 M lactic acid (HC3H5O3) solution
Explain What is the concentration of the HCl, A 25.00 mL sample of HCl of unknown concentration is completely neutralized with 25.00 mL
if you take a 12.5 mL portion of the stock solution and dilute it to a total volume of 0.600L what will be the concentration of the final solution?
What would the potential of a standard hydrogen (S.H.E.) electrode be if it was under the following conditions?
170 mL of an HCl solution with pH of 2.60 is added to 200 mL of an HNO3 solution. The resulting pH is 1.40. What was the pH of the original HNO3 solution?
At 25 ºC, the vapor pressure of water is 23.8 torr. What is the vapor pressure of a solution prepared by dissolving 97.0 g of C6H12O6 (a nonvolatile solute) in 170 g of water.
Consider the case is which the volume and temperature of ONE mole of an ideal gas depends explicitly on the time, t. obtain an equation (a differential equation essentially)
Deduce the structure of the molecule that is composed of carbon, hydrogen and oxygen with a MS molecular mass peak value of 100 and molecular peak values of m/z = 29, 43, 57, 71, 100
An injection containing 10.0pg 10 5 B was injected into a patient suffering from a brain tumor. The patient was irradiated by a neutron gun at the site of the tumor.
Calculate the molarity of hypochlorite ion in a commercial bleach solution. It contains 5.25% sodium hypochlorite by mass and the density ofthe solution is 1.08 g/mL.
From this statement alone, can you conclude that the solution is acidic? If not, what additional information would you need
The molality of sodium nitrate solution us 1.44m. What is mole fraction of NaNo3. The molar mass of NaNo3 is 85.06g/mol
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