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Chapter 4 - Solution Chemistry and the Hydrosphere
Vocabulary
39
Chemistry
Undergraduate 1
05/05/2010

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Term
Solution
Definition
a uniform mixture of two or more substances
Term
Solvent
Definition
the component present in the largest amount; in an aqueous solution this is water
Term
Solutes
Definition
the components present in smaller amounts than the solvent; may contain one or more
Term
Molarity
(M)
Definition
a concentration unit; it is the amount of solute (in moles) divided by the volume of a solution (in liters)
Term
Stock Solution
Definition
a concentrated solution of a substance used to prepare solutions of lower concentrations
Term
Dilution
Definition
the process of lowering the concentration of a solution by adding more solvent
Term
Electrolyte
Definition
a substance that dissociates into ions when it dissolved, enhancing the conductivity of the solvent
Term
Strong Electrolyte
Definition
a substance that dissociates completely into ions when it dissolves in water
Term
Nonelectrolyte
Definition
a substance that does not form ions and does not enhance the conductivity of water when it dissolves
Term
Weak Electrolyte
Definition
only partly ionizes when it dissolves in water
Term
Hydronium Ion
Definition
the form in which the hydrogen ion is found in an aqueous solution
Term
Bronsted-Lowry Acid
Definition
proton donor
Term
Bronsted-Lowry Base
Definition
proton acceptor
Term
Neutralization Reaction
Definition
takes place when an acid reacts with a base and produces a solution of salt in water
Term
Salt
Definition
the product of a neutralization reaction; a salt is made up of the cation characteristics of the base and anion characteristics of the acid in the reaction
Term
Molecular Equation
Definition
describes a reaction in solution in which the reactants are written as undissociated molecules
Term
Overall Ionic Equation
Definition
shows all the species, both ionic and molecular, present in a reaction occurring in aqueous solution
Term
Net Ionic Equation
Definition
describes the actual reaction taking place in aqueous solution, and is found by eliminating the spectator ions
Term
Spectator Ions
Definition
present in, but remain unchanged by, the reaction taking place
Term
Strong Acid
Definition
completely ionized in aqueous solution
Term
Weak Acid
Definition
weak electrolyte and only partially ionized in aqueous solution, it has a limited capacity to donate protons to the medium
Term
Strong Base
Definition
completely ionized in aqueous solution
Term
Weak Base
Definition
weak electrolyte and only partially ionized in aqueous solution; has a limited capacity to accept protons in the medium
Term
Amphiprotic
Definition
substance can behave as either an acid or a base
Term
Precipitate
Definition
a solid product formed from a reaction in solution
Term
Saturated Solution
Definition
contains more than the quantity of a solute that is predicted to be soluble in a given volume of solution at a given temperature
Term
Ion Exchange
Definition
a process by which one ion is exchanged for another; usually carried out, 2+ ions in water that contribute to its hardness are removed from the water that in exchange for sodium ions
Term
Zeolites
Definition
natural crystalline minerals or synthetic material consisting of 3D networks of channels that contain sodium or other 1+ cations; they may function as ion exchanged
Term
Oxidation
Definition
a chemical change in which a species loses electrons; oxidation number decreases
Term
Reduction
Definition
a chemical change in which a species gains electrons; oxidation number decreases
Term
Oxidation Number
(Oxidation State)
Definition
a positive or negative number bases on the number of electrons that each atom of the element gains or loses when it forms an ion or that it shares when it forms a covalent bond with another element
Term
Oxidizing Agent
Definition
in a redox reaction accepts electrons from another species, thereby oxidizing that species; itself is reduced
Term
Reducing Agent
Definition
in a redoz reaction gives up electrons to another species, thereby reducing that species; itself is oxidezed
Term
Half-Reactions
Definition
one for the oxidation component and one for the reduction component
Term
Titration
Definition
an analytical method for precisely determining th e concentration of a solute in a sample by reacting it with a standard solution of known concentration
Term
Standard Solution
Definition
a solution of known concentration
Term
Titrant
Definition
the standard solution added to the sample in a titration
Term
Equivalence Point
Definition
the point where the number of moles of titrant added is stoichemetrically equal to the number of moles of the substance being analyzed
Term
End Point
Definition
reached when just enough standard solution has been added causing the indicator to change color
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