75 mL of 0.2 M NaOH were added to 100 mL of 0.1M aspartate solution, pH=pI. Whatis the new pH? pKavalues for aspartate are 1.88, 3.65 (R-group) and 9.60.8.A) 1.40B) 4.13C) 6.62D) 2.76E) 9.60If we are not given the starting pH, how do wedo this question?

The titration of the amino acid with a strong base like NaOH results in the loss of protons in a…

Answered: 75 mL of 0.2 M NaOH were added to 100…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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What is the pH of a grapefruit that contains 0.007 M citric acid solution (CHgO7)? C6H307(aq) + H₂O(E)= CsH707 (aq) + H₂O*(aq) K₂=7.5 x 104 Round your answer to 2 decimal places.
The amino acid glycine is often used as an ingredient in buffers for biochemistry experiments. The amino group of glycine has a pKa of 9.6. Glycine exists in either a protonated form (-NH3+) or a free base (-NH₂). a) In what pH range can glycine be used as an effective buffer? b) In a 0.1M solution of glycine at pH 9.0, what fraction has its amino group in the protonated form? c) When 99% of the glycine is in the protonated from, what is the numerical relation between the pH of the solution and the pKa of the amino group?
You have been observing an insect that defends itself from enemies by secreting a caustic liquid. Analysis of the liquid shows it to have a total concentration of formate plus formic acid (K₁ = 1.8 x 10-4) of 1.45 M. Further analysis reveals that the concentration of formate ion is 0.015 M. What is the pH of the secretion? pH =
Given the titration curve of the hypothetical polyprotic acid X at 0.100 M concentration (pKa1=4.0, pKa2=8.0, pKa3=12.0) titrated with 0.600 M NaOH, identify the pH at point C, H, E, and M.
A purified protein fraction has a total sample volume of 450 µL. The sample has a corrected A280 of 0.244, and the blank corrected A280 was 0.077. (Both values were measured with a path length of 1.00 cm.) If 5.50 µL of the sample was used in a reaction, calculate the mass of protein in the reaction (in µg).
What is the pH of a 0.150 M solution of acetic acid (pK₂ = 4.75) at 25 °C?
If you added three proteins (Protein A, pI 5.0; Protein B, pI 6.0; Protein C, pI 7.0) to an anion exchange column equilibrated with bicine buffer, pH 8.5, in what order would these protein be expected to elute as the column was loaded, washed, and then increasing amounts of NaCl were added?
In an experiment, separation of albumin from chicken liver was attempted at 31%, 58%, and 65% saturation with ammonium sulfate, (NH4)2SO4. After homogenization and centrifugation, 23 ml of the supernatant was obtained. What is the volume of saturated buffered (NH4)2SO4 (pH 7.0) that must be added to make the solution 31% saturated? 10.3 ml 8.33 ml 9.50 ml O 12.2 ml
A purified protein fraction has a total sample volume of 360 µL. The sample has a corrected A280 of 0.484, and the blank corrected A280 was 0.052. (Both values were measured with a path length of 1.00 cm.) If 5.00 µL of the sample was used in a reaction, calculate the mass of protein in the reaction (in µg).
Example The reference range for blood pH is 7.35 – 7.42. What is this range expressed as [H+] in nmol l-1? Calculation: pH = - log [H+] 7.35 = - log [H+] [H+] = antilog -7.35 = 4.47 x 10-8 mol.l-1 = 44.7nmol.l-1 similarly: pH 7.42 = 38.0 nmol.l-1 Range [H+] = 38 – 44.7 nmol.l-1 If the blood pH decreases in an acidosis from 7.42 to 7.15, what is the change in [H+] in nmol.l-1? so this is example on the worksheet, but i still understand how to answer the question.
Can you please calculate the following?

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75 mL of 0.2 M NaOH were added to 100 mL of 0.1M aspartate solution, pH=pl. What is the new pH? pKa values for aspartate are 1.88, 3.65 (R-group) and 9.60. 8. A) 1.40 B) 4.13 C) 6.62 D) 2.76 E) 9.60 If we are not given the starting pH, how do we do this question?