Chem 120 Final| 153 Questions| With Complete Solutions

Levelling Effect correct answer: the inability of a solvent to differentiate amongst the relative strength of all acids OH- correct answer: the strongest base possible H3O+ correct answer: the strongest acid possible Differentiating effect correct answer: the ability of a solvent to differentiate among the relative strengths of all acids Common Ion Effect correct answer: the shift in equilibrium caused by the addition of a compound having an ion in common with the dissolved substance; common to the equilibrium and suppresses the ionization of a weak acid or weak base Buffers correct answer: two component system that resist pH changes upon the addition of small amounts of either acid or base (i.e. weak acid and conjugate base, weak base and conjugate acid) -- equimolar amounts Buffer capacity correct answer: maximum amount of acid or base that a buffer can neutralize before its pH changes appreciably; {HA } and {A-} must be large and approx equal to each other titration correct answer: a solution of accurately known concentration is gradually added to another solution of unknown concentration until the chemical reaction between the two solutions is complete equivalence point correct answer: point at which the reaction is complete indicator correct answer: substance that changes color at (or near) equivalence point titrant correct answer: solution added from burette acid base indicator correct answer: weak organic acid or base for which the ionized and unionized forms are different colors Johann Glauber correct answer: first to synthesize sulfuric acid, nitric acid, and hydrochloric acid Antoine Lavoisier correct answer: believed that all acids contain "oxygen"