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116 Exam 1 Review
Chapter 3
14
Biology
Undergraduate 1
02/07/2011

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Term
Acid
Definition
Donate H+ when dissolved in water, pH <7
Term
Base
Definition
Accept H+ when dissolved in water, pH >7
Term
Buffer
Definition
Stabilize pH by accepting H+ if acidic, or donating H+ if basic (ex. Carbonic Acid in blood)
Term
Cohesion
Definition
Attraction between like molecules (found in water, H bonds)
Term
Evaporative Cooling
Definition
Due to water's high specific heat, water molecules take away heat when they evaporate (ex. sweating)
Term
Hydrogen Bond
Definition
bonds between H on polar molecules (H20)
Term
Hydrophilic
Definition
molecule who's attracted to/dissolved by water (polar molecules)
Term
Hydrophobic
Definition
molecule who's repelled by water (nonpolar molecules, ex. hyrdrocarbons/oil)
Term
pH
Definition
=-log[+H], concentration of +H's
Term
pH scale
Definition
logarithmic scale, change in one unit 10X change in concentration
Term
proton exchange
Definition
proton acceptor (base) proton donor (acid)
Term
solvent
Definition
what is doing the dissolving, water is a good solvent
Term
specific heat
Definition
1 cal/1 g/1 *C for water
Term
state (solid, liquid, gas)
Definition
water becomes less dense in solid state (ice floats)
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