Problem: Calculation of the pH ofaSolution of a Polyprotic AcidHistidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, as shown below (His = imidazole group). A biochemist makes up 100mL of a 0.100M solution of histidine at a pH of 5.40. She then adds 40mL of 0.10M HCl. What is the pH of the resulting solution?

FREE Expert Solution


View Complete Written Solution
Problem Details

Calculation of the pH ofaSolution of a Polyprotic Acid

Histidine has ionizable groups with pKa values of 1.8, 6.0, and 9.2, as shown below (His = imidazole group). A biochemist makes up 100mL of a 0.100M solution of histidine at a pH of 5.40. She then adds 40mL of 0.10M HCl. What is the pH of the resulting solution?

All Biology Practice Problems Calculating pH Practice Problems
Q.How does the pH of the solution on the right compare with that of the solution on the left? a) The solution on the right is acidic relative to the sol...
Q.Calculate the pH of a solution of 0.0043M H2SO4. Round up to a one decimal place.
Q.What is the proton concentration ([H+]) of a solution with a pH of 5?Give your answer as a decimal value.
Q.If the broth's beginning pH was 5.2 and changed to 8.8, what was the fold-change in the proton concentration?Express your answer in scientific notatio...
See all problems in Calculating pH

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Calculating pH concept. If you need more Calculating pH practice, you can also practice Calculating pH practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Yeargain's class at UCF.