Lab Final Flashcards
Mathematical model for water cooling from experiment 1
Exponential decay
Nominal volume
The volume given by the measuring device. May differ from the true volume appreciably.
Mean deviation formula
(Σ|x - x̄ |)/n
Can pentane solutions be poured down the sink?
No!
How do you clean the glassware in experiment three, in which pentane and oleic acid was used?
Rinse the glassware with acetone or pentane, NEVER water!
Flow of light through a spectrophotometer
Light source –> lens –> sample cell –> slit –> diffraction grating –> diode array detector
Beer’s Law
Relates absorbance to concentration
A = (molar absorptivity)(path length)(concentration)
What temperature is a bunsen burner in its dark blue inner cone?
Extremely hot
What temperature is a bunsen burner in its pale blue violet outer region?
Moderately hot
What temperature is a bunsen burner if its flame is luminous and yellow?
Cool
Concentration (c) calculation
= (absorbtivity)(cm or unit of length) / (absorbance) = ab/A
Percent yield formula
(Experimental mass / theoretical mass) times 100
In the redox reaction involving hydrogen peroxide and permanganate, what is being oxidized?
Oxygen / hydrogen peroxide
In the redox reaction involving hydrogen peroxide and permanganate, what is being reduced?
Manganese / permanganate
In the redox reaction involving hydrogen peroxide and permanganate, what is the oxidizing agent?
The permanganate ions