Can adding 1000mg of L-Tyrosine to a solution that has a pH of 4.0 change the pH of the entire solution at all? The solution is 240mL.
2006-08-24 11:06:27 · 4 answers · asked by ScienceNut 2 in Science & Mathematics ➔ Chemistry
Tyrosine's isoelectric point is 5.66, so it would be protonated at both the carboxylic acid group and the amine group at pH = 4 and tend to increase pH.
2006-08-24 13:46:53 · answer #1 · answered by qda 3 · 0⤊ 0⤋
L-Tyrosine like all amino acids has a basic and an acidic group, so when you dissolve it in water it will change the pH.
If you dissolve tyrosine in a buffer then it depends on the buffering capacity of the solution and the amount of Tyrosine you added.
Maybe you wouldn't see a change at pH=pI=5.64 since at that pH nearly all of the molecules will have lost an H+ from the -COOH and at the same time gained a H+ at the -NH2.
2006-08-24 23:19:33 · answer #2 · answered by bellerophon 6 · 0⤊ 0⤋
Tyrosinen is a polar amino acid that has an alcohol group which I think might be deprotonated at pH4, so I don't think that adding Tyrosine to a soultion of pH4 affect the pH drastically. That's my guess.
2006-08-24 12:55:35 · answer #3 · answered by Natasha B 4 · 0⤊ 1⤋
Dude. Homework is for the home. And yourself. Not others.
2006-08-24 11:40:14 · answer #4 · answered by k-bear77 1 · 0⤊ 2⤋