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Ch.15 - Acid and Base EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch.17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Acids Introduction
Bases Introduction
Binary Acids
Amphoteric Species
Arrhenius Acids and Bases
Bronsted-Lowry Acids and Bases
Lewis Acids and Bases
The pH Scale
Ka and Kb
pH of Strong Acids and Bases
Ionic Salts
pH of Weak Acids
pH of Weak Bases
Diprotic Acids and Bases
Diprotic Acids and Bases Calculations
Triprotic Acids and Bases
Triprotic Acids and Bases Calculations
Additional Guides
Conjugate Acids and Bases

TRiprotic Acids and Bases require ICE Charts to determine their pH and pOH respectively

Triprotic Acids and Bases Calculations

Concept #1: The acidic form of a triprotic acid has its pH solved in a similar way to monoprotic acids.

Example #1: Determine the pH of a 0.225 M phosphoric acid, H3PO4, solution. Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8 and Ka3 = 4.2 x 10-13.

Practice: Determine the pH of 0.250 M sodium phosphate, Na3PO4. Phosphoric acid, H3PO4, contains Ka1 = 7.5 × 103, Ka2 = 6.2 × 108 and Ka3 = 4.2 × 1013.

Practice: Determine the pOH of 0.450 M citric acid, H3C6H5O7. It possesses Ka1 = 7.4 × 104, Ka2 = 1.7 × 105 and Ka3 = 4.0 × 107.