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Glossary of Chemistry Terms 2

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reaction mechanism
sequence of steps molecules go through on changing from reactants to products
chemical kinetics
study of how chemical reaction rates change
exothermic
release energy
endothermic
absorb energy
energy-neutral
neither absorbs or releases energy
activation energy
amount of energy that must be availible to reactants before becoming products
catalyst
something that increases rate of reaction by lowering activation energy
enzyme
catalyst in living systems
substrate
reactant molecule that fits into pocket
active site
pocket on enzyme
dynamic equilibrium
rate of forward reaction equals rate of reverse
Le Chatelier's Principle
If you disturb a reaction at equilibrium, the reaction returns to equilibrium by shifting in such a direction as to partially undo the disturbance
Ksp
6.000 x 10^-19
acid
sour taste, red on litmus, eats metals to make H gas

Arrhenius definition: electrolyte that produces H30+ ions in water

Bronsted-Lowry definition: anything that donates a proton
base
bitter, dark blue on litmus, produced slippery aqueous solutions

Arrhenius definition: electrolyte that produces OH- ions in water


Bronsted-Lowry definition: anything that accepts a proton
electrolyte
aqeuous solution of a substance that conducts an electrical current and dissociates into water producing ions
dissociation
breaking apart to produce ions
pH
-log[H30+]
buffer
resists changes in pH
conjugate base/conjugate acid
makes up conjugate pair, what buffer is made up of

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