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UTA CHEM 1442 CH 14
Acid Strength and Base Strength
22
Chemistry
Undergraduate 1
03/04/2010

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Term
Bronsted-Lowery Theory
Definition
an acid is any substance (molecule or ion) that can transfer a proton (+H ion) to another substance, and a base is any substance that can accept a proton.
Term
Acids are proton _________
Definition
donors
Term
Bases are proton ________
Definition
acceptors
Term
acid-base reactions are ________
Definition
proton-transfer reactions
Term
Bronsted-Lowery acid
Definition
a substance that can transfer H+
Term
Bronsted-Lowery base
Definition
a substance that can accept H+
Term
conjugate acid-base pairs
Definition
species whose formulas differ only by one proton
Term
hydronium ion H3O+
Definition
Product of Bronsted-Lowery reaction. (the conjugate aid of H2O)
Term
for a molecule or ion to accept a proton, it must _________________. All bronsted-lowery bases have this.
Definition
it must have at least one unshared pair of electrons that it can use for bonding to the proton.
Term
strong acid
Definition
one that is almost completely dissociated in water and is therefore a strong electrolyte
Term
electrolyte
Definition
substance that dissolves in water to produce solutions that conduct electricity
Term
HClO4
Definition
perchloric acid (strong)
Term
HCl
Definition
Hydrochloric Acid (strong)
Term
HBr
Definition
Hydrobromic acid (strong)
Term
HI
Definition
Hydroiodic acid (strong)
Term
strong acids have very ______ conjugate bases
Definition
weak
Term
weak acid
Definition
one that is only partially dissociated in water and is thus a weak electrolyte
Term
HNO2
Definition
nitrous acid (weak acid)
Term
HF
Definition
hydrofluoric acid (weak)
Term
CH3CO2H
Definition
acetic acid (weak)
Term
NH3, OH-, and H2
Definition
very weak acid that dont transfer protons which let the acid dissociation equilibrium lie 100% to the left.
Term
pH scale
Definition
refers to the power of 10 (the exponent) used to express the molar H3O+ concentration.
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