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276 solutions

Buffer

Q. 3. Find the pH of 200.0 mL buffer from exercise 1 after the addition of 150.0 mL of 0.020M NaOH.

Solved • Oct 2, 2019

Buffer

Q. 2. Find the pH of 100.0 mL of the buffer from exercise 1 after the addition of 0.030 mol of gaseous hydrochloric acid. Assume no volume change.

Solved • Oct 2, 2019

Buffer

Q. A certain indicator HIn has a pKa of 3.80 and a color change becomes visible when 8.31% of the indicator has been converted to In−. At what pH is this color change visible?

Solved • Dec 3, 2019

Buffer

Q. Lactic acid is a common by-product of cellular respiration and is often said to cause the "burn" associated with strenuous activity. A 25.0 mL sample of 0.124 M lactic acid (HC3H5O3, pKa = 3.86) is titrated with 0.124 M NaOH solution. (Assume that all solutions are at 25°C.) Calculate the pH after the addition of the following amounts of NaOH. (25.1 ml)

Solved • Dec 1, 2019

Buffer

Q. Calculate the pH after 0.36 mole of HCl is added to 1.09 L of a solution that is 0.57 M HC3H5O3 and 1.09 M KC3H5O3

Solved • Nov 30, 2019

Buffer

Q. Calculate the pH after 0.17 mole of NaOH is added to 1.10 L of a solution that is 0.54 M HF and 1.24 M LiF, and calculate the pH after 0.34 mole of HCl is added to 1.10 L of the same solution of HF and LiF.

Solved • Dec 1, 2019

Buffer

Q. Which of the following can be classified as buffer solutions? (Select all that apply.)

Solved • Nov 29, 2019