8_Ch17_AqEquilibria_1

2 find the ph a strong acidbase b weakacid

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Unformatted text preview: Base buffers and <tra<ons 21 Titra<on of a Weak Acid with a Strong Base At each point below the equivalence point, the pH of the solu<on during <tra<on is determined from the amounts of the acid and its conjugate base present at that par<cular <me. Remember: Buffer solutions are encountered during titrations! 22 buffers and <tra<ons Example: Titra<on of a Weak Acid with a Strong Base Titrate 0.1M CH3COOH (Ka = 1.8 x 10-5) with 0.2M NaOH starting with 50 mL of CH3COOH solution and calculate pH when the following quantities of NaOH are added: a. 0 mL NaOH b. 12.5 mL NaOH buffers and <tra<ons 23 Example Cont.: Titra<on of a Weak Acid with a Strong Base Titrate 0.1M CH3COOH (Ka = 1.8 x 10-5) with 0.2M NaOH starting with 50 mL of CH3COOH solution and calculate pH when the following quantities of NaOH are added: c. NaOH needed to reach d. 30 mL NaOH equivalence point buffers and <tra<ons 24 Titra<on of a Weak Base with a Strong Acid The pH at the equivalence point in these <tra<ons is < 7. indicator of choice is: 25 buffers and <tra<ons Titra<on of a Weak Acid with a Strong Base 26 buffers and <tra<ons...
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