PRACTICE QUESTIONS AND CORRECT
ANSWERS GENERAL CHEMISTRY I
COMPLETE STUDY GUIDE A+ EXAM PREP
neutral solution - CORRECT ANSWER-H+ = OH-
basic solution - CORRECT ANSWER-H+ < OH-
conjugated acid-base pair - CORRECT ANSWER-pair of molecules or ions
that are related to one another by the gain or loss of a proton
HF + H20 <----> H+ = F-
HF is the acid
F- is the conjugate base
electrolyte - CORRECT ANSWER-substance that dissociates ions and
conducts electricity
nonelectrolyte - CORRECT ANSWER-substance that does not dissociate
and so will not conduct electricity
,strong electrolyte - CORRECT ANSWER-substance that completely
dissociates
weak electrolyte - CORRECT ANSWER-substance that partially dissociates
neutralization - CORRECT ANSWER-reaction between an acid and base to
produce a salt and water
HCl + NaOH -----> NaCl + H20
salt - CORRECT ANSWER-ionic compounds containing a positive ion
other than the hydrogen ion and a negative ion
reactions (acids) - CORRECT ANSWER-1.neutralization
2. reactions with active metals (Produces hydrogen gas)
3. reactions with metal hydroxides (Produces salt and water)
4. Reactions with metal oxides
5. reactions with carbonates and bicarbonates
6. reactions with ammonia and ammines
basic salt - CORRECT ANSWER-salt of a weak acid and strong base. Basic
salt is acidic in water
,acidic salt - CORRECT ANSWER-salt of strong acid and weak base. It is
basic in water
neutral salt - CORRECT ANSWER-a salt whose aqueous solution is neither
acidic nor basic
hydrolysis reaction - CORRECT ANSWER-the reaction of a salt with water
to produce H1+ ion or OH 1- ion or both types of salt hydrolysis
1. strong acid and strong base = neutral solution
2. strong acid and weak base = acidic solution
3. weak acid and strong base = basic solution
4. weak acid and weak base = slightly acidic, neutral, or slightly basic
solution
acid ionization constant - CORRECT ANSWER-Ka - an equilibrium
constant for the ionization of an acid in aqueous solution to H+ and its
conjugate base
Ka = H+ A-/ HA
Acid strength increases as the magnitude of Ka increases
Kw - CORRECT ANSWER-ion product constant of H2O
H+ x OH- 1.0 x 10^ -14
, pOH - CORRECT ANSWER-14-H
pH - CORRECT ANSWER--log [H+]
pH scale - CORRECT ANSWER-a scale of small number that is used to
specify molar H+ ion concentration in aqueous solution
acid = 0-6.9
neutral = 7
base = 7.1 -14
indicators - CORRECT ANSWER-a substance that is different colors at
different pHs
blue litmus paper - CORRECT ANSWER-will turn red in an acid solution
red litmus paper - CORRECT ANSWER-will turn blue in a base solution
phenolphthalein - CORRECT ANSWER-an indicator that colorless in an
acid and pink in a basic solution
pH meters - CORRECT ANSWER-a precise rapid way to determine the
degree of acidity of a solution