For TLC plates of amino acids: You will be using a mixture of 5:1:4 volume ratio...
For TLC plates of amino acids:
You will be using a mixture of 5:1:4 volume ratio of butanol, glacial acetic acid (pure acetic acid), and water, pH of water is 7, in this lab.
Assume that butanol is the same as water in terms of a pH calculation.
The density of acetic acid is 1.05 g/ml.
The molecular weight of acetic acid is 60.05 g/mol.
The Ka of acetic acid HAc is 1.8*10^-5.
You can make the assumption that [H+] = [Ac-] << [HAc] here.
What is the pH of this solution?
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For TLC plates of amino acids:
You will be using a mixture of 5:1:4 volume ratio...
You will be using a mixture of 5:1:4 volume ratio of butanol, glacial acetic acid (pure acetic ac...
You will be using a mixture of 5:1:4 volume ratio of butanol, glacial acetic acid (pure acetic acid), and water in this lab. Assume that butanol is the same as water in terms of a pH calculation. The density of acetic acid is 1.05 g/ml. The molecular weight of acetic acid is 60.05 g/mol. The Ka of acetic acid HAc is 1.8*10^-5. You can make the assumption that [H+] = [Ac-] << [HAc] here. What is the pH of this...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag and drop each amino acid onto it's correct place on the TLC. . baseline Ser Leu Gin Gly Drag and drop the markers to rank them from farthest to closest to the cathode when separated through electrophoresis at pH = 5. His pl = 7.64 Ser pl = 5.68 Arg pl = 10.76 Ala pl = 6.11 Farthest from cathode Closest to cathode Ala...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag and drop each amino acid onto it's correct place on the TLC. . baseline Ser Leu Gin Gly Drag and drop the markers to rank them from farthest to closest to the cathode when separated through electrophoresis at pH = 5. His pl = 7.64 Ser pl = 5.68 Arg pl = 10.76 Ala pl = 6.11 Farthest from cathode Closest to cathode Ala...
1.) Calculate the molarities of the buffer species: You have 170.0 mL of an acetic acid...
1.) Calculate the molarities of the buffer species: You have 170.0 mL of an acetic acid and conjugate base buffer. The total moles of the buffer equals 0.100M, the pH is 5.00. The ka(acetic acid) is 1.8 x 10 -5. Show the buffer equilibrium rxn; show all calcs and steps for credit. 2.) How would you make a buffer given the following: A bottle of solid sodium acetate, a stock bottle of 6.0M acetic acid, water and lab equipment is...
can you please write the calculations with clear writing and explanations and thank you (3) (4)...
can you please write the calculations with clear
writing and explanations and thank you
(3) (4) B) Preparation a) Place about 50 ml of distilled water in a 0.1 liter volumetric flask. b) Use a 1 ml pipette to transfer 0.83 ml of conc. HCl to the flask. Add distilled water until the volume is 0.1 liter. Save for later use. Prepare 0.1 liter of 0.1 M sodium hydroxide (MW= 40.0 (skip this exercise)). A) Calculations B) Preparation Prepare 0.1...
Problems 1) Look at the structure of the natural amino acids (look them up). What do the 8 primordial amino acids have in common (generally)? What do you notice about the ones with 2 or fewer codons?...
Problems 1) Look at the structure of the natural amino acids (look them up). What do the 8 primordial amino acids have in common (generally)? What do you notice about the ones with 2 or fewer codons? 2) Calculate the actual information content per amino acid of protein translation by using the genetic code and the fact that in nature, the frequency of U and C is 22%, A is 30% and G is 26%. Finally, since 3 of 64...
please help with number 4. if you feel like hwlping with number 5, that would be...
please help with number 4. if you feel like hwlping with
number 5, that would be cool too. thank you
E) 1812.a 4) A 15 mL sample of 0.025 M NH3 is titrated with a 0.016 M solution of HCl. What is the pH after 12 mL of acid is added? The Kb of NH3 is 1.8.10-5 B) 10.27 C) 2.09 4 O 9210 5) A 17 mL sample of 0.25 M glacial acetic acid is titrated with a 0.25M...
1. 1x10^-9 moles of strong acid HCl are added to of water (total volume is 1L)....
1. 1x10^-9 moles of strong acid HCl are added to of water (total volume is 1L). the pH of the resulting solution is... a)9 b)8 c)7 d)5 e)2 I got 9 but got the answer incorrect, so i would like to know how to solve this properly and what is the final answer. 2. the pKa of acetic acid is 4.76. if the pH=4.76 and the concentration of sodium acetate is 0.1M, what is the concentration of acetic acid? a)0.05...
4. What molar ratio of HPO4 2-to H2PO4-in solution would produce a pH of 7.0? Phosphoric...
4. What molar ratio of HPO4 2-to H2PO4-in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotic acid, has 3 pKa values: 2.14, 6.86, and 12.4. Hint: Only one of the pKa values is relevant here. 5. For a weak acid with a pKaof 6.0, calculate the ratio of conjugate base to acid at a pH of 5.0. 6. Which of these compounds would be the best buffer at pH 5.0: formic acid (pKa 3.8), acetic acid...
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and...
Lab 5 Buffers 1. Dissolved ions in salt solutions can act as acids or bases and react with water to produce hydronium ions or hydroxide ions that contribute to the pH of the salt solution. Since strong acids and strong bases completely ionize in solution, the reverse reaction essentially does not occur, meaning that the resulting conjugate base of a strong acid or conjugate acid of a strong base do NOT act as acids or bases. Ions that are conjugate...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag and drop each amino acid onto it's correct place on the TLC. . baseline Ser Leu Gin Gly Drag and drop the markers to rank them from farthest to closest to the cathode when separated through electrophoresis at pH = 5. His pl = 7.64 Ser pl = 5.68 Arg pl = 10.76 Ala pl = 6.11 Farthest from cathode Closest to cathode Ala...
A TLC is developed of a mixture of amino acids. The results are shown below. Drag and drop each amino acid onto it's correct place on the TLC. . baseline Ser Leu Gin Gly Drag and drop the markers to rank them from farthest to closest to the cathode when separated through electrophoresis at pH = 5. His pl = 7.64 Ser pl = 5.68 Arg pl = 10.76 Ala pl = 6.11 Farthest from cathode Closest to cathode Ala...
can you please write the calculations with clear
writing and explanations and thank you
(3) (4) B) Preparation a) Place about 50 ml of distilled water in a 0.1 liter volumetric flask. b) Use a 1 ml pipette to transfer 0.83 ml of conc. HCl to the flask. Add distilled water until the volume is 0.1 liter. Save for later use. Prepare 0.1 liter of 0.1 M sodium hydroxide (MW= 40.0 (skip this exercise)). A) Calculations B) Preparation Prepare 0.1...
Problems 1) Look at the structure of the natural amino acids (look them up). What do the 8 primordial amino acids have in common (generally)? What do you notice about the ones with 2 or fewer codons? 2) Calculate the actual information content per amino acid of protein translation by using the genetic code and the fact that in nature, the frequency of U and C is 22%, A is 30% and G is 26%. Finally, since 3 of 64...
please help with number 4. if you feel like hwlping with
number 5, that would be cool too. thank you
E) 1812.a 4) A 15 mL sample of 0.025 M NH3 is titrated with a 0.016 M solution of HCl. What is the pH after 12 mL of acid is added? The Kb of NH3 is 1.8.10-5 B) 10.27 C) 2.09 4 O 9210 5) A 17 mL sample of 0.25 M glacial acetic acid is titrated with a 0.25M...
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