Test 1 Flashcards
Which functional group has dispersion forces as their dominant IMF?
The Alkyl functional group, common makeup CH
Which functional group has hydrogen bonding as its dominant IMF?
The Alcohol functional group, common makeup OH
Which functional group has dipole-dipole as its dominant IMF?
The Ketone function group, common makeup CO
Which functional group also has a dipole-dipole IMF?
The alkyl halide functional group, Common makeup a carbon bound to a halide (CCl)
Why does surface tension occur?
Liquid molecules obey closest packing and are pulled from the surface toward the liquid
Explain Capillary action
Capillary action happens due to cohesion and adhesion, if there is cohesion a dip will form on the water’s surface and if there is adhesion a bulge will form.
does viscosity increase or decrease with increasing IMFs?
Increase, the molecules will want to resist flow more
does vapor pressure increase or decrease with increasing IMFs?
decrease, fewer molecules will be able to overcome the IMFs to get to the gas phase.
What is the Clausius Clapeyron equation?
ln(𝑃2/𝑃1 )=(∆𝐻𝑣𝑎𝑝)/𝑅∗(1/𝑇1 −1/𝑇2 )
Does Solubility increase or decrease with lower temperatures?
decreses
What is Raoult’s law
𝑃_𝑠𝑜𝑙𝑣𝑒𝑛𝑡=𝑥_𝑖∗𝑃_𝑠𝑜𝑙𝑣𝑒𝑛𝑡^0
If a solute is added to a solvent, does the temperature at which the solvent freezes (increase or decrease)?
decrease
What is the osmotic pressure equation?
𝜋=𝑖∗𝑀∗𝑅∗𝑇
how can you use moles to find molecular weight?
mass/moles = molecular weight (remember MW is in g/mole).
what is a colloid?
a heterogeneous mixture consisting of particles of one substance dispersed in another
