Exam 1 Flashcards
Analytical Process Step 1
Identify and state the problem
Analytical Process Step 2
select procedures
Analytical Process Step 3
obtain the sample
Analytical Process Step 4
prepare the sample
Analytical Process Step 5
analyze the sample
Analytical Process Step 6
interpret and report results
Analytical Process Step 7
make conclusions
Qualitative Analysis
what is in the sample?
Quantitative Analysis
how much is in the sample?
Chemical Identification
unknown chemical in sample
Structural Analysis
mass, composition, structure, or analyte
Property Characterization
chem/physical properties of analyte
Spatial Analysis
distribution of analyte through sample
Time-dependent
change of analyte or property over time
Standard Operating Procedure
quality assurance, control experiments, set of guidelines everyone follows
distilled
boiled, removes particulates, dissolved solids, microorganisms and pyrogens
deionized
remove ions, dissolved gases
readability
smallest division weight
resolution
capacity/ readability, should be high
macroanalytical balance
0.0001
semimicrobalance
0.00001
microbalance
0.000001
ultramicrobalance
0.0000001
industrial precision scale
0.0001-0.1 kg
precision balance
0.001-1 g
weigh by difference
take out of container on balance, avoids oil
correction for buoyancy
Mobj= Mdisp x (1-(Dair/Dref))/(1-(Dair/Dobj))
Class A glassware
pyrex, borosilicate, Kimax glass, best tolerance, but expensive
Class B glassware
Borosilicate glass, plastics, tolerance has more error, less expensive, used for metals
parallax error
occurs when the buret is not read at eye level
molality
moles of solute / kg solvent
formality
moles formula units / L
molarity
moles / L
Normality
equivalent moles / L
% weight
g solute / 100 g solution