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Problem- Part- A) What is the ratio of conjugate base to conjugate acid at pH values 1, 2, and 3 pH units above and below a pKa value? For one of these ratios, show how you obtained your answer using the Henderson-Hasselbach equation.
Part- B) Why do the R side groups of amino acids occur in the trans position?
Rewrite your answer from the stating and prove each step carefully.
0.40 moles of a diprotic acid, H2A, is dissolved in 250 mL of water. The Ka1 of this acid is 1.0 x 10E-5 and Ka2 is 1.0 x 10E-9. What is the concentration of the di-anion, [A^2-], in this solution (in M)
THe first equivalence point was reached after the addition of 15.25 mL of base. THe second equivalence point was reached after the addition of 30.98 mL. Find two values for the molarity of H3Y in the original sample.
You would like to create a reflection grating like the one shown at the right, with an incident angle (θ) of 43 °. Calculate the number of lines per centimeter that should be etched in the grating for each of the following conditions:
a saturated solution of caf2 was found to have a f- concentration of 6.7 x 10-4m at 25degc. what is the ksp and whatis
Calculate the kg/h of wet cake feed needed to produce 1000 kg/h of "dry" ?sh cake product.
The number of grams of water required to dissolve a mixture containing 15 g of KNO3 and 3.5 g CuSO4 * 5 H2), assuming that the solubility of one substance is not affected by the presence of another
A sample of propane,C3H8 , contains 18.0 moles of carbon atoms. How many total moles of atoms does the sample contain? Express the total number of moles of carbon and hydrogen numerically.
To prepare a solution of 50% sulfuric acid, a dilute waste acid containing 28% h2SO4 is fortified with a purchased acid containing 96% H2SO4. How many kilograms of the purchased acid must be bought for each 100 kg of dilute acid
A 100 ml sample of 0.10 M Ca(OH)2 is titrated with 0.10 M HBr. Determine the pH the solution after the addition of 300.0 ml HBr
For the following, provide a structure of the molecules described. If the name is incorrect please provide the correct IUPAC name. 3-(1-cyclobutylethyl)-5-[3-cyclopropyl-1-(3-bromo-2-(1,1-dimethylethyl)propyl)propyl]cyclohexane.
If you perform two column chromatographic separations in two columns of equal size, one column packed with a silica gel of smaller size than the other, would the outcome of the separation be different
if the walls in a room are 955 square feet in area and a gallon of paint covers 15 square yards how many gallons of
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