Vocab Flashcards
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Net Ionic Equation
Includes only those compounds and ions that undergo a chemical change in a reaction in an aqueous solution.
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Spectator ions
Ions that do not take part in a chemical reaction and are found in a solution both before and after the reaction.
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Ionization
Ions are formed from solute molecules by the action of the solvent.
Strong electrolyte
Book: any compound of which all or almost of the dissolved compound exists as ions in an aqueous solution.
Notes: lots of ionization, very few unionized
Ex. Saltwater
Weak electrolyte
Book: a compound of which a relatively small amount of the dissolved compound exists as ions in an aqueous as ions in an aqueous solution.
Notes: little ionization takes place.
Ex. HC2H3O
Colligative Properties
Book: properties that depend on the concentration of solute particles but not on their identity.
Notes: depend only on concentration of the solution. Not the chemicals in the solution.
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Nonvolatile substance
One that had little tendency to become a gas under existing conditions.
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Molal freezing-point constant (Kf)
The freezing-point depression of the solvent in a 1- molal solution of a nonvolatile, nonelectrolyte solute.
Freezing-point Depression
Book: the difference between the freezing points of the pure solvent and a solution of a nonelectrolyte in that solvent, and it is directly proportional to the molal concentration of the solution.
Notes: a solution will freez at a lower temperature than the pure solvent.
-always subtracting
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Molal boiling-point constant (Kb)
The boiling-point elevation of the solvent in a 1-molal solution of w nonvolatile, nonelectrolyte solute.
Boiling-point Depression
The difference between the boiling points of the pure solvent and a nonelectrolyte solution of that solvent and it is directly proportional to the molal concentration of the solution.
-always an increase
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Semipermeable membrane
Allow the movement of some particles while blocking the movements of others.
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Osmosis
The movement of solvent through a semipermeable membrane from the side of lower solute concentration to the side of higher solute concentration.
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Osmotic pressure
The external pressure that must be applied to stop osmosis.
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Binary acid
An acid that contains only two different elements: hydrogen and one of the more-electronegative elements.