ANALYTICAL CHEMISTRY FINAL- ACS EXAM QUESTIONS AND ANSWERS A+ GRADED. BUY Quality Materials!
T/F All data points must be collected at the same wavelength
T
Write the beers law equation
A=Ebc
% RSD
SD/Mean * 100
RSD is used for Accuracy/Precision T/F
False, precision only
Errors that ca...
T/F All data points must be collected at the same wavelength
T
Write the beers law equation
A=Ebc
% RSD
SD/Mean * 100
RSD is used for Accuracy/Precision T/F
False, precision only
Errors that can be fixed
Systematic
Unavoidable errors
Random
Limit of Detection estimated (LOD)
3s/m Minimum detected signal
Limit of Quantitation calibration (LOQ)
10s/m signal thats 10 times greater than the noise, so it is significant enough
Minimum Detectable Signal
X blank+ 3S standard
Limit of Detection exact method
X blank + 3s-b/m
Limit of Quantitation Signal
X blank+10S standard
The rate of a chemical reaction is the _______ of _______ reacted or produced per
_______ ______.
amount,substance,unit time
In general, the lower the surface area of the reactants, the faster the reaction T/f
False
In general, the rate of a reaction slows over time T/f
True
A plot of x = time and y = number of moles is linear
False *** find why
The rate of a reaction can be expressed in terms of the...
Appearance of the product &Disappearance of the reactants
For IR and UV-vis radiation, absorption of a photon changes the energy of the
analyte's valence electrons. T/F
False
The bonds and functional groups that give rise to the absorption of ultraviolet
and visible radiation are called
Chromophores
Transmittance is not directional proportional to concentration
True, inversely related
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