bio lab 106 final Flashcards
pH of pure water
7
buffers
sets of chemicals that “soak up” excess H+, keep pH stable
ocean acidification
too much CO2 absorbed, pH decreases
diffusion
movement from high to low concentration ; driven by random(brownian) motion/kinetic energy
what does the rate of diffusion depend on?
temp, molecular weight, and solvent density
osmosis
movement of water across a semipermeable membrane
isotonic solution
same concentration of solutes and water
hypotonic solution
lower concentration of solutes and higher water
hypertonic solution
higher concentration of solutes and lower water
mode
number with the greatest frequency
standard deviation
how “clustered” values are
null hypothesis
there is no difference between the groups of data
standard alpha value
0.05
statistic < a
reject null hypothesis - difference is present
statistic > a
accept/ fail to reject null hypothesis - no difference
enyzmes
proteins that act as catalysts
enzymes ___ the activation energy in a reaction
lower
wavelength
distance between wave peaks
transmittance
how much light makes it through the solution