110 Acids, Bases, Salts, And Buffers SeagerlSlabaugh 4. How could you tell which
ID: 516956 • Letter: 1
Question
110 Acids, Bases, Salts, And Buffers SeagerlSlabaugh 4. How could you tell which of the solutions that were able to buffer well against added acid has the greatest buffering capacity against acid? a. Add equal amounts of acid to each solution until the pH of one solution changes signifi- cantly. b. Add equal amounts of base to each solution until the pH of one solution changes signifi- cantly. c. The solution with the highest pH after adding the 2 mL of acid has the greatest buffering capacity Explain your answer:Explanation / Answer
A buffer must consist of a weak conjugate acid-base pair, thus it is a weak acid and its conjugate base, or a weak base and its conjugate acid.
The of this solution is remain unchanged by adding acid or base. In general the of this solution is constant. .
Hence a buffer prevents the pH of a solution from changing.
Now we can slowly add acid to the buffer solutions and see how much the pH changes with each addition of acid or base for each solution. The solution that has the least amount of change in pH is the best buffer and has the highest buffering capacity.
Buffer capacity is defined as follows:
Buffering Capacity = (amount of acid or base)/(change in pH)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.