Ph and buffers pdf

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An important property of buffer solutions is its ability to maintain a relatively constant pH value in response to the addition of small amount of acid or base. This relatively flat zone is the buffering region of the acetic acid-acetate-buffer pair. The pH at this point in a titration curve of acetic acid is equal to •The bicarbonate system is crucial for blood maintenance. •changes of pH greater than 0.1 are dangerous and can lead to coma -diabetics. Properties of water. A basic solution will have a pH above 7.0, while an acidic solution will have a pH below 7.0. · Buffers are solutions that contain a weak acid and its aadded, the salt concentration increases while the acid concentration decreases and the pH of the buffer mixture is raised. The assignment of the appropriate pKa If they are not you say that you have exceeded the "buffering capacity".) 4. Explain why the pH does not change very much when a small amount of strong acid or What is the pH of the buffer solution? Kb = 1.8 x 10-5 for NH3. Answer: The buffer involves the NH3/NH4. + conjugate acid/base When the pH = 7, the solution is neutral. •Physiological pH range is. 6.5 to 8.0. Page 6. Weak Acids and pKa.