What is the predominant form of citric acid (H3C6H5O7) at pH 4.37 and pH 6.12? Citric acid has pKa values of 3.128 (pKa1), 4.761(pKa2), and 6.396 (pKa3). (These are all multiple choice) Please help!
PH 4.37 a) H2C6H5O7– b) H3C6H5O7 c)HC6H5O72– d) C6H5O73–
PH 6.12 a)C6H5O73– b)H2C6H5O7– c)H3C6H5O7 d) HC6H5O72–
What is the second most abundant species of citric acid at each pH? PH 4.37 a)H3C6H5O7 b)H2C6H5O7– c)HC6H5O72– d)C6H5O73–
PH 6.12 a)HC6H5O72– b)H2C6H5O7– c)H3C6H5O7 d)C6H5O73–
Consider a solution of 10 mM aspartic acid at its isoelectric
pH. (Its -COOH group has a pka of 1.99; -NH3 group pka
of 9.90; side chain pka of 3.90)
1.) What is the concentration in mM of the major isoelectric
form?
2.) What is the concentration in mM of the species with all
groups unprotonated?
3.) How many total forms are present in solution, including
those that are present even at very low concentration?
Please show how you got...
Determine the isoelectric pH for threonine, aspartic acid,
arginine, and the tripeptide his-ile-lys. You will probably have to
write out the equations in order to do this correctly.
How do I draw lewis dot structures? (i.e. count for valence
electrions, how to know when to use single vs. double vs. triple
bonds, and an explanation of the octet rule)
Q1. What is the dominant form of benzoic acid at pH 2. Suggest
the dominant form of caffeine at pH 2.
Q2. This lab uses a C18-reverse phase column. What does the
stationary phase consists of? Is it polar or nonpolar?
Q3. Predict whether benzoic acid or caffeine will come out of
the C18-reverse phase column first at pH 2.
Q4. To prepare the calibration standard solutions, calculate how
much of each stock solution of sodium benzoate and caffeine should...
I want to draw a sphere and I want to rotate it, How can I do it
in JOGL? ( I am working on a program to visualize the sun )
please provide a pic of the code.