chapter 2 water Flashcards
what does the reactivity of many functional groups depend on
pH
covalent bond example
o-h
C-H
C-C
what is the rough bond strength of a vovalent bond
460 round to 500
what is an example of a ionic interaction bond and whaqt is its bond strength
-COO- or NH3+
86 round to 90
hydrogen bond example + strength
O-H-O
20
dipole dipole interaction
C=O
9.3
london disperson or van der waals
C-H…H-C 0.3
what is the order of strongest to least strongest bond
covalent
ionic interaction
hydrogen
dipole dipole
london dispersion
for this class never draw H to what
H that bonds to C like C-H
what is the shape of ice
hexagonally packed (honeycomb shape)
satisfies the H bonding potentinal
liquid water is denser than
ice
what is one of the most polar solvents around
waterwha
what is water an excellent solvent for
charged and polar species
- ions
what is water a poor solvent for
nonpolar solutes: oil and water don’t mix
what happens when a small ampunt of nonpolar solute gets immersed inwater
hydrophobic effect: nonpolar solutes aggregate and clump together to minimize their contact with the polar solvent
is hydrophobic effect an increase or decrease in entropy
first an increase in order of water molecules = decrease in entropy
ds= -ve which is unfavorable
what drives hydrophobic effects / interaction
overall increase in entropy that water molecules achieve by excluding a nonpolar solute
what does amphillic molecule mean
both polar and nonpolar groups
Fatty acids or sodium dodecy sulfate (SDS)
what is micelle formation driven by
entropy
