1 / 12

Acid Base Reactions and Titration Curves

Acid Base Reactions and Titration Curves. Vocab. Titrant Analyte Endpoint/Equivalence point Indicators. Common Indicators. Phenolphthalein Formal name: 3,3-bis(4-hydroxyphenyl)-1( 3H )-isobenzofuranone, 3,3-bis(4-hydroxyphenyl)phthalide). Bronsted Acid Conj. Base

cholena-harris
Download Presentation

Acid Base Reactions and Titration Curves

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Acid Base Reactions and Titration Curves

  2. Vocab • Titrant • Analyte • Endpoint/Equivalence point • Indicators

  3. Common Indicators

  4. PhenolphthaleinFormal name: 3,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone, 3,3-bis(4-hydroxyphenyl)phthalide) Bronsted Acid Conj. Base (colorless, in acid) (pink, in base)

  5. Types of Reactions • Strong Acid - Strong Base • Weak Acid - Strong Base • Strong Acid - Weak Base

  6. 1. Strong Acid - Strong Base • Example: HCl + NaOH --> • Titration Equation: Ma • Va = Mb •Vb Equivalence Pt pH = ____ If 50. mL of HCl was titrated with 0.050 M NaOH, what is the [HCl]

  7. A 25. mL sample of HCl titrated using 50 mL of 0.050 M NaOH. Sketch this curve. pH Volume of Base Added

  8. 2. Weak Acid - Strong Base • Example: CH3COOH + NaOH --> • MV=MV pH

  9. 2. Weak Acid - Strong Base Important Points • pH = pKa when halfway to equivalence point • The formation of a conjugate base A- will make the solution BASIC at equivalence, so pH > 7

  10. 3. Weak Base - Strong Acid • Example: NH3 + HCl --> • MV=MV pH = pKb pH 12.5

  11. 3. Weak Base - Strong Acid Important Points • pH = pKb at halfway to equivalence point • The formation of a conjugate acid BH+ will make the solution ACIDIC at equivalence, so pH < 7

  12. Titration of Diprotic Acids 2 equivalence pts

More Related