Acids and Bases: Lecture 10: Hammett's Acidity Function

Описание: #hammett_equation

For highly powerful acids or highly concentrated acids or for the super acids pH is not a suitable scale for measuring the acidity strength. In that case a new tool has been introduced that is known as the Hammette Acidity Function H0.

Click below for the next video

   • Acids and Bases: Lecture 11: Super Acids  

Click below for the previous video

   • Acids and Bases: Lecture 9: Donor Number a...  

Acids and Bases

Lecture 1:    • Acids and Bases: Lecture 1: Arrhenius, Fra...  
Topic: Arrhenius, Franklin and Bronsted-Lowry Concepts
Subtopics: Concept of acidity and basicity: Arrhenius, Franklin; Limitations of Arrhenius and Franklin, The Brönsted-Lowry Protonic concept, Acid1+Base2 = Acid2 + Base1, Features of the Protonic Concept, Limitations of the Protonic Concept.

Lecture 2:    • Acids and Bases: Lecture 2: Lux-Flood Concept  
Topic: Lux-Flood Concept
Subtopics: Lux-Flood Concept, Acidity Parameter (aB and aA), Why is Fe2(CO3)3 an unstable compound? Selected acidity parameters ‘a’ for acidic, basic and amphoteric oxides.

Lecture 3:    • Acids and Bases: Lecture 3: Lewis Acids an...  
Topic: The Lewis Concept or the Electronic Theory
Subtopics: The Lewis Concept or the Electronic Theory, Examples of Lewis acids and Lewis bases, gharer, speciality of Lewis concept, demerits of the Lewis acids concept

Lecture 4:    • Acids and Bases: Lecture 4: The Usanovic C...  
Topic: The Usanovic Concept
Subtopics: Acid Base adduct: The facts, Usanovich Concept, General trend of acid base character in the periodic table, The aspects of coordination, Acid Base adduct: Change in bond length, Acid Base adduct: Gutman’s rule.

Lecture 5:    • Acids and Bases: Lecture 5: Comparative St...  
Topic: Comparative Strengths of Oxoacids or Oxyacids, Gutman's Rule
Subtopics: Strengths of Oxo-acids, Acidity ka decreases, pka increases, Attachment of additional oxygen atoms, Exceptional case: Phosphorous oxyacids H3PO2: H3PO3: H3PO4, H2S: HS–, H2SO3 : HSO3–, H3PO4 : H2PO4– : HPO42–, Strengths of Oxo-acids: Pauling’s rules

Lecture 6:    • Acids and Bases: Lecture 6: Pauling Rule f...  
Topic: Pauling Rule for Relative Acidity of Oxoacids
Subtopics: The ‘–I’ effect, The ‘+I’ effect, Monochloro acetic acid (ClCH2COOH) is a stronger acid than acetic acid (CH3COOH), The resonance effect, Aniline is a weaker base than alkyl amines

Lecture 7:    • Acids and Bases: Lecture 7: Solvent Leveli...  
Topic: Solvent Leveling and Differentiating Effect
Subtopics: Types of solvent on the basis of proton interaction, Solvent Leveling and Differentiating, Solvent leveling and Differentiating, Co-solvating agent, Q. When water is used as a solvent, the leveling effect will prevent the presence of bases stronger than hydroxide – Explain., Q. Why is acetic acid a strong acid in liquid ammonia?, Q. Why does aqueous solution of NH4Cl which is weakly acidic, becomes strongly acidic in presence of CuCl2?

Lecture 8:    • Acids and Bases: Lecture 8: Drago Wayland ...  
Topic: Drago Wayland Equation
Subtopics: Drago-Wayland Equation, Elaboration of the Drago-Wayland Parameters, Drago-Wayland parameters for some acids and bases (in kJ.mol-1), Features of Drago-Wayland Equation, Outcomes of Drago-Wayland Equation (the possibility of adduct formation between SbCl5 and I2), Experimental validity of Drago-Wayland Equation

Lecture 9:    • Acids and Bases: Lecture 9: Donor Number a...  
Topic: Donor Number and Acceptor Number
Subtopics: Donor number DN and Acceptor number AN, Free Energy of solvation, comparison of DN, AN with relative permittivity εr.

Lecture 10:    • Acids and Bases: Lecture 10: Hammett's Aci...  
Topic: Hammett's Acidity Function
Subtopics: For highly powerful acids or highly concentrated acids or for the super acids pH is not a suitable scale for measuring the acidity strength. In that case a new tool has been introduced that is known as the Hammette's Acidity Function H0.

Lecture 11:    • Acids and Bases: Lecture 11: Super Acids  
Topic: Super Acids
Subtopics: The concept of super acidity, Hammet's acidity function of super acids, Examples such as oleum, SbF5 + oleum, SbF5 + HF, SbF5 + HSO3F, SO3/SbF5 + HSO3F etc.