LAB G Flashcards
go over all lab calculations in lab G
in book
what happens when species in consumed in terms of absorbance and its color
-decrease
-colorless
learning objective
gain experience in psuedu rate law
scientific purpose
determine rate law for the reaction of EB and sodium by integrated rate law
-absorbance
what is absorbance equation
A=ebc
e=extinction
b=path length
c=concentration
is ocl constant during a trial
no cause the concentration changes over time
if temp was lowered what would happen to the rate law
it would decrease
ph to concentration
10 e
concentration to ph
-log
poh to ph
14-poh
buffer
WA and CB
what are the ph calibrators
4, 7, 10
for buffer solutions, you want your ph to be as close to the
pka
buffer concentration formula
mol of acid + mol of base/ volume of buffer solution
learning objectives
-using a ph meter
purpose
prepare a buffer and test its buffer capacity
3 ways on finding ph
=universal doner (cabbage)
-pH paper
-pH meter
why ph meter over ph paper
more precise
paper is approx values
equiv point
mol=mol
half equiv point
half of titrant added
buffer region
before after mid points
small amounts
after equiv
dominated by titrant
start of titration
only base or acid present
