From graph we can see that at half equivalence point;
pH = pKa = 10.2
So, pKb = 14 - pKa = 14 - 10.2 = 3.8
pKb = 3.8 ...Answer
Tryptamine (C10H12N2) is a stimulant found in chocolate. Its molecular structure is shown below. The associated...
Methyldopa (C10H13N04) is used to treat high blood pressure during pregnancy. Its molecular structure is shown below. The pka of the carboxylic group is 1.7 and the pk of the amine group is 4.2. Which of the following forms of this drug is likely to be present in our blood which has a pH close to 7.4? НО. ОН NH2 НО НО. он NH2 NH НО НО с. Но d. HO он NH2 HO НО o А а.
7. Below is the structure of lysine in its hypothetical neutral form. Choose the structure of lysine as it would exist in aq. solution at neutral pH. O HN-CH-C-OH CH CH CH CH NH2 lysine . HUN-CH-C- CH-8- -OH ---- H2N-CH HN- OH CH2 H₂N-CH 1 CH2 CH2 1 CH2 H₂N -CH- CH2 CH2 CH2 CH2 CH2 CH CH CH2 CH CH2 CH2 CHE CH2 CH2 NH CH2 CH2 NHS NHS NH3 E NH2 D с B А
explain the following answers
8. (3 pts) Consider the structure of histidine, shown below, along with the three pk, values of the three acidic groups. What is the isoelectric point (pl) for histidine? NH2 pka COOH = 1.77 = 6.10 pka, NH3+ = 9.18 pka, ning A) 3.94 C) 5.68 B) 5.48 D) 7.64 histidine OH 9. (3 pts) Which one of the following forms of histidine is the form that would mainly exist near pH = 4? HN NH2...
7. Below is the structure of lysine in its hypothetical neutral form. Choose the structure of lysine as it would exist in aq. solution at neutral pH. H2N-CH-C-OH CH2 CH2 CH2 1 CH2 1 NH2 lysine O HNCH CH-Z8 OH =ç«-&_• HN-CH- CH2 HUN-CH 1 CH2 CH2 HEN-CH CH2 CH2 CH2 CH2 1 NH2 HENCH CH2 CH 1 CH2 CH H2N-CH CH2 CH2 CH2 CH2 NH, CH2 CH2 CH2 CH2 NH3 CH2 @NH @NH A B С D E
Be able to identify and know the function of each molecular structure shown below: OH ?? SH CH2 CH2 H I E CH20H O-P-0CH2 H OH
show work please
1) The structure of the compound imidazole is shown below, with its ionization reaction and pka. a) At PH 7.5, which form of imidazole do you expect to predominate? (1 pt) b) What percentage of imidazole is charged at pH 7.5? (3 pt)
An aqueous solution of morphine has a pH of 9.61. Its structure is shown below. Would the morphine molecule have to act as a Bronzed/Lowry acid or Bronzed/Lowry base in order for the solution to have this pH? Explain, and based on your answer, indicate where in the morphine molecule the proton is donated or accepted. Determine the hydroxide ion concentration in this solution of morphine. Do you value for [OH^-1] make sense for a pH of 9.61? Explain.
The structure of glycine in its fully protonated form is shown below. Its first pKa is 2.34, while its second pKA is 9.6. What will be the average net charge on glycine molecules in a solution whose pH is 3.34? Explain your answer fully with a combination of words and equations as appropriate! (That's what's written) H3N^+-CH2-COOH Glycine Thanks guys. I missed the review going over this and Im a little anxious as the test is soon. I have the...
The skeletal structure of 2,3,7,8-Tetrachlorodibenzo-p-dioxin
(TCDD) is shown above. Its molecular formula is
C12H4Cl4O2.
Write the complete Lewis structure for TCDD on a piece of
scrap paper and answer the questions below:
1. How many double bonds are present in TCDD?
2. How many valence electrons are present in TCDD?
3. How many lone pair (non-bonding) electrons are present in
TCDD?
Question 7 (3 points) CI C. The skeletal structure of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is shown above. Its molecular formula is...
7 Marks The structure of cytosine, one of the four is one of the four main bases found in DNA is shown below. Assign the bonding geometry around each numbered atom in cytosine. 3 HC6 HC NH2 Bonding geometry Atom NI C2 N3 Identify the strongest type of intermolecular forces present in the following four compounds and using this information explain the order of the melting points Melting point (C) -220 Strongest Intermolecular force Species F2 -129 NF3 -87 HBr...