Ch.16 - Aqueous Equilibrium See 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: In a titration a student used 16.60 mL of 0.100 M NaOH to titrate a 0.2000-g sample of an unknown acid. Which of the following acids would the unknown most probably be? Assume that only the hydrogens bonded to oxygen (in BOLD) are titrated by the sodium hydroxide, and that, due to experimental error, the student's value may not be identical with the theoretical value. A. succinic acid. HOOCCH2CH2COOH,molar mass = 118 B. benzoic acid. C6H5COOH. molar mass = 122 C. phthalic acid. C6H4(COOH)2. molar mass = 166 D. oxalic acid. HOOC—COOH. molar mass = 90. E. Not enough information is provided to narrow the selection to one.

Problem

In a titration a student used 16.60 mL of 0.100 M NaOH to titrate a 0.2000-g sample of an unknown acid. Which of the following acids would the unknown most probably be? Assume that only the hydrogens bonded to oxygen (in BOLD) are titrated by the sodium hydroxide, and that, due to experimental error, the student's value may not be identical with the theoretical value.

A. succinic acid. HOOCCH2CH2COOH,molar mass = 118

B. benzoic acid. C6H5COOH. molar mass = 122

C. phthalic acid. C6H4(COOH)2. molar mass = 166

D. oxalic acid. HOOC—COOH. molar mass = 90.

E. Not enough information is provided to narrow the selection to one.