PCAT Chapter 29 Solubility Exam Test Questions with 100% correct answers |Verified |Rated A+
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PCAT Chapter 29 Solubility
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PCAT Chapter 29 Solubility
Alkali Metals (first row of periodic table) - ANSWER-All salts of alkali metals are water soluble
Nitrates (NO3-) - ANSWER-All nitrates are water soluble
Ammonium Ion (NH4+) - ANSWER-All salts of ammonium ion are water soluble
All carbonates (CO3 2-), phosphates (PO4 3-), sulfides (S 2-), and su...
PCAT Chapter 29 Solubility Exam Test
Questions with 100% correct answers
|Verified |Rated A+
Alkali Metals (first row of periodic table) - ANSWER-All salts of alkali metals are water soluble
Nitrates (NO3-) - ANSWER-All nitrates are water soluble
Ammonium Ion (NH4+) - ANSWER-All salts of ammonium ion are water soluble
All carbonates (CO3 2-), phosphates (PO4 3-), sulfides (S 2-), and sulfites (SO3 2-) are - ANSWER-
Insoluble unless they are paired with alkali metals or ammonium ion
All halides are - ANSWER-Water soluble! Unless they are with Pb2+, Ag+, or Hg 2+
Ba2+ (Barium), Ca2+ (Calcium), Sr2+ (Strontium) paired with metal Oxides, Hydroxides, and Sulfates are -
ANSWER-All metal oxides are insoluble with the exception of CaO, SrO, BaO and alkali metal oxides
Hydroxides are insoluble, with the exception of Ca2+, Sr2+, Ba2+, and alkali metal hydroxides
All sulfates are soluble, with the exception of those containing Ca2+, Sr2+, and Ba2+
Electrolyte - ANSWER-must be both soluble and produce charges as a result of its dissolution.
strong electrolyte - ANSWER-a solution in which a large portion of the solute exists as ions
Example of a strong electrolyte - ANSWER-salts, strong acids, strong bases
NaCl, KI, and molecular compounds with highly polar covalent bonds that dissociate into ions when
dissolved
, weak electrolyte - ANSWER-a solution that conducts electricity poorly because only a small amount of
the solute exists as ions
example of weak electrolyte - ANSWER-weak acid/base - dissociate partially to give ions in solution
CH3COOH (acetic acid), NH3 (ammonia), HgCl2
Is sugar an electrolyte? - ANSWER-No. Sugar, is soluble in water since it dissolves in water, but it
produces no charged species in aqueous form.
sugar(s) --(H2O)--> sugar (l)
Is hydrogen fluoride (HF) an electrolyte? - ANSWER-Yes. HF is a weak electrolyte because it is a weak
acid and it dissociates only very slightly in water.
HF(s) --(H2O)--> F-
supersaturated solution - ANSWER-solution that contains more solute than found in a saturated solution
non electrolyte solution - ANSWER-a liquid or solid substance or mixture that does not allow an electric
current; do not ionize at all in aq sol
ex: many nonpolar gases and organic compounds (oxygen and sugar)
mole fraction (X) - ANSWER-X = number of moles of the compound / total number of moles of all species
% composition by mass - ANSWER-(mass of solute/ mass of solution) * 100
molarity (M) - ANSWER-moles of solute/liters of solution (mol/L)
molality (m) - ANSWER-moles solute / kg solvent (mol/kg)
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