stickiness (high cohesion, adhesion, surface tension forces), ability to moderate temperature (high heat capacity, heat of vaporization), expansion upon freezing, versatility as a solvent)

hbonds hold water molecules tightly together

hbonds form between water and other polar materials

resist external force due to cohesive nature of molecules, allows small nonpolar objects to sit on top of water

expands upon freezing

ice is less dense than liquid h2o. ice forms crystalline structure.

h2o is universal solvent. most efficient liquid in the world, dissolves substances better than any chemical

measure of relative amount of h+ ions in an aq soln

produce h+ ions when dissociating in water, forming h3o+, result in lower pH

remove h+ ions from water, forming oh- ions, result in higher pH

solutes that resist change in pH

long chains of linked carbons & hydrogen atoms

carboxyl, carbonyl, hydroxyl, amino, methyl, phosphate, sulfhydryl

carbohydrates, lipids, proteins, nucleic acids

monosaccharides, fatty acids, amino acids, nucleotides

add water to polymer, breaking a covalent bond in polymer backbone. breaks down polymers

dehydration synthesis

creation and removal of water molecules from 2 monomers, resulting in formation of bond between them. linking monomers to form polymers.

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BI220 E1 L8

lecture 8 slides

Question	Answer
water properties	stickiness (high cohesion, adhesion, surface tension forces), ability to moderate temperature (high heat capacity, heat of vaporization), expansion upon freezing, versatility as a solvent)
cohesion	hbonds hold water molecules tightly together
adhesion	hbonds form between water and other polar materials
high surface tension	resist external force due to cohesive nature of molecules, allows small nonpolar objects to sit on top of water
specific heat (high heat capacity)	resists change in temp
expands upon freezing	ice is less dense than liquid h2o. ice forms crystalline structure.
solvent	h2o is universal solvent. most efficient liquid in the world, dissolves substances better than any chemical
pH	measure of relative amount of h+ ions in an aq soln
acids	produce h+ ions when dissociating in water, forming h3o+, result in lower pH
bases	remove h+ ions from water, forming oh- ions, result in higher pH
buffers	solutes that resist change in pH
hydrocarbon	long chains of linked carbons & hydrogen atoms
functional groups	carboxyl, carbonyl, hydroxyl, amino, methyl, phosphate, sulfhydryl
4 macromolecules	carbohydrates, lipids, proteins, nucleic acids
4 monomers	monosaccharides, fatty acids, amino acids, nucleotides
hydrolysis	add water to polymer, breaking a covalent bond in polymer backbone. breaks down polymers
dehydration synthesis	creation and removal of water molecules from 2 monomers, resulting in formation of bond between them. linking monomers to form polymers.

Created by: knorrod

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