Ch.16 - Aqueous Equilibrium WorksheetSee 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

Solution: A 0.551 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 26.0 mL . The solution is then titrated with a saturated calcium hydroxide solution.The pH after adding 20.0 mL past the first equivalence point was 8.25. Find the value of pKa2 .

Problem

A 0.551 g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 26.0 mL . The solution is then titrated with a saturated calcium hydroxide solution.

The pH after adding 20.0 mL past the first equivalence point was 8.25. Find the value of pKa2 .