Polyprotic Acids and Acidic Strength | JEE 2027 Chemistry (English)

Free notes + solved JEE problems for this lesson: https://rankdeterminant.com/go/yt-che... All lessons of this unit:    • JEE 2027 Chemistry | Unit 6 Equilibrium   Polyprotic acids like H2S, H2CO3 and H3PO4 ionise in steps with Ka1 much greater than Ka2: the pH from the first step, [A2−] ≈ Ka2 for the acid alone, and [S2−] with HCl present as in group II analysis. Then what makes an acid strong: HF HCl HBr HI, CH4 NH3 H2O HF, oxyacids, chloroacetic acids and the basicity of H3PO3, with two solved problems on H2S. Chapters 0:00 Introduction 0:33 Polyprotic acids give their protons in steps 1:38 The acid alone in water: two shortcuts 2:24 Add a strong acid: the common ion 3:13 What makes an acid strong? The bond to hydrogen 4:10 Oxyacids, chloroacetic acids and phosphorus acids 5:19 Example 1: pH, HS- and S2- in 0.10 M H2S 6:28 Example 2: S2- in H2S when 0.10 M HCl is present 7:38 Quick revision: polyprotic acids and acid strength order A free JEE paper every day and a full JEE Main mock every Sunday: https://rankdeterminant.com/go/yt-dai... Chemistry · Unit 6 · Equilibrium · Chapter 3 · Acids, Bases and pH #PolyproticAcids #JEEChemistry #JEE2027 Narrated with a computer voice.