Chemistry Homework Help

Browse Homework Solutions

394 solutions

Buffer

Q. Calculate the pH of a solution made by mixing 200 mL of 0.100 M potassium formate with 50.00 mL of 0.15 M hydrochloric acid. Remember, you have a table of Ka values, and if you don’t know what formate is, but know some naming conventions, you can figure it out. Please CLEARLY show all of your work and write you answer in the box.

Solved • May 5, 2020

Buffer

Q. A flask contains 50 mL of a buffer that is 0.10M in acetic acid and 0.20 M in acetate ion. What will the pH be after 8.0 mL of 0.16 M NaOH is added to the buffer? The pKa of acetic acid is 4.74.

Solved • Apr 27, 2020

Buffer

Q. A flask contains 50 mL of a buffer that is 0.10M in acetic acid and 0.20 M in acetate ion. What will the pH be after 15.0 mL of 0.10 M HCl is added to the buffer? The pKa of acetic acid is 4.74.

Solved • Apr 27, 2020

Buffer

Q. For each of the following solutions, calculate the initial pH and the final pH after adding 0.0200 mol of NaOH. For 290.0 mL of a buffer solution that is 0.2975 M in CH3CH2NH2 and 0.2675 M in CH3CH2NH3Cl, calculate the initial pH and the final pH after adding 0.0200 mol of NaOH(Kb=5.6⋅10^−4).

Solved • Apr 27, 2020

Buffer

Q. What is the pH of a solution made by mixing 30.0 mL of 0.250 M hypochlorous acid with 16.0 mL of 0.400 M potassium hypochlorite?

Solved • Apr 27, 2020

Buffer

Q. Use the Henderson-Hasselbalch equation to calculate the pH of each of the following solutions. a solution that contains 0.705 % C5H5N by mass and 0.895 % C5H5NHCl by mass (where pKa=5.23 for C5H5NHCl acid)

Solved • Apr 24, 2020

Buffer

Q. How many moles of sodium hydroxide would have to be added to 125 mL of a 0.399 M acetic acid solution, in order to prepare a buffer with a pH of 4.530?

Solved • Apr 20, 2020