The common-ion effect refers to the decrease in this property of the precipitate when an ion shared by a weak electrolyte is added. For 10 points each:
[10e] Name this property that can be quantified with a Ksp (“K-S-P”), its namesake “product constant,” or as the amount of one substance dissolved in another at maximum saturation.
ANSWER: solubility [accept word forms like soluble; accept solubility product constant]
[10m] The decreased solubility resulting from the common-ion effect can be explained using this principle. This principle predicts that the forward reaction becomes more favorable with higher reactant concentration.
ANSWER: Le Chatelier’s (“luh sha-tell-YAY’s”) principle [or Braun–Le Chatelier principle or Le Chatelier–Braun principle; prompt on equilibrium law]
[10h] This quantity for ionic solutions is important for describing deviations from ideality since the Debye (“duh-BYE”) length is inversely proportional to its square root. This quantity equals [read slowly] “one-half times the sum over all ions of concentration times charge squared.”
ANSWER: ionic strength [or molar ionic strength]
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