formation of colored ions Flashcards
what is white light
it is a spectrum made up of different colors
how do we see a color
it is the wavelength of light that is reflected
wha happens when d electron absorb light energy
it excites electron to a higher d subshell and the energy gap is corresponded to the light we see
how do we measure the energy difference e
delta e enrgy absorbed= frequency of light *planks constant
what changes the amount of energy absorbed
the change in ligand, change in oxidation state, change in coordination number
how to carry out spectroscopy
simple colorimeter can be used to determine combination of ions in a solution
add a color enhancer and make up a solution of a known concentration, measure absorption and plot absorbance calibration curve, measure for different concentration and compare
why is this method better than titration
only a small sample is used to determine concentration
why must we use cuvette of the same size
as value of absorbance changes when wavelength travels different distances
