ANALYTICAL CHEMISTRY REVIEW TEST

ANALYTICAL CHEMISTRY REVIEW TEST
Analytical chemistry - CORRECT ANSWERSS-provides the tools to make qualitative
and quantitative measurements of components in complex samples

classical methods - CORRECT ANSWERSS-'wet' gravimetric titrimetric complexometric
and redox

wet bench

modern instrumental methods - CORRECT ANSWERSS-spectroscopic,
electrochemical chromatographic & electrophoretic

Combination methods - CORRECT ANSWERSS-- used to achieve analytical accuracy

slurry - CORRECT ANSWERSS-suspention of solid & liquid

supernatant liquid - CORRECT ANSWERSS-liquid above a pack solid

aqueous - CORRECT ANSWERSS-in water

quantitative transfer - CORRECT ANSWERSS-complete transfer of a solid
- any residue remaining would causer error

General steps in a chemical analysis - CORRECT ANSWERSS-1) formulate a question
2) select appropriate analytical procedure
3) take your sample
4) prep your sample
5) analyze your smaple
6) report and interpret
7) draw conclusion

Goals of Analytical - CORRECT ANSWERSS-- large sample sizes
-statistics
-precise & accurate measurements

solute - CORRECT ANSWERSS-minor species in solution

solvent - CORRECT ANSWERSS-major species used to dissolve the minor (solute)

solution - CORRECT ANSWERSS-the mixture of solute and solvent

concentration - CORRECT ANSWERSS-how much solute is contained in a given
volume or mass of a solution or solvent

, Molarity - CORRECT ANSWERSS-Moles/Liter

-M

molality - CORRECT ANSWERSS-moles/kg solution

-m

Formal Concentration - CORRECT ANSWERSS-- F

-rarely used, equivalent to molarity of initial species that in solution becomes something
else

Mass per unit volume - CORRECT ANSWERSS-- mg/L
-mg/dL
-ug/mL

wt% - CORRECT ANSWERSS-(mass of analyte/mass of total solution of sample)*100

vol% - CORRECT ANSWERSS-volume of analyte/volume of total solution*100

ppm - CORRECT ANSWERSS-mass of analyte/mass of sample*10^6

ppb - CORRECT ANSWERSS-mass of analyte/mass of sample*10^9

Preparing solution. Method 1 - CORRECT ANSWERSS-from a solid
-based on the concentration and volume of solution you want, figure out the amount of
solid needed
-dissolve with the solvent to make up to the desired volume

Preparing solution. Method 2 - CORRECT ANSWERSS-Dilution from a concentrated
solution
-M1V1=M2V2
-the above equation stands as long as M1 and M2 have the same units and V1 and V2
also have the same units

Stoichiometry - CORRECT ANSWERSS-- the quantitative relationship between
constituents and/or chemicals
--> calculations of quantities of substances involved in a chemical rxn

-determine starting materials
-calculate product amounts
-to convert between different substances