ANALYTICAL CHEMISTRY
ANALYTICAL CHEMISTRY EXAM 1 QUESTIONS AND ANSWERS
What does an analytical chemist do? - correct answer
Identifying what is in an unknown is called qualitative
analysis. Identifying how much is present is called
quantitative analysis.
Describe the steps in a chemical analysis. - correct answer 1)
What do you want to know? -What substance (analyte)
are you looking for? 2) Select appropriate procedures -
Literature Search -New Procedure 3) Gathering
Representative Samples -Random heterogeneous
material-Segregated heterogeneous material
4) Preparing Samples for Analysis 5) The Actual Analysis
6) Setting Up Calibration Curves 7) What Do The Results
,ANALYTICAL CHEMISTRY
Mean? 8) Reporting your Results-A complete report,
including a discussion of the limitations of the data and
the analysis. 9) Drawing Conclusions-how can this
Information be used
SI units - correct answer meter m: kilogram kg: second s:
current ampere A: temperature kelvin K: candela cd:
mole mol:
Prefixes - correct answer yotta- (Y-) 10²⁴: zetta- (Z-)10²¹: exa- (E-
) 10¹⁸: peta- (P-)10¹⁵: tera- (T-)10¹²: giga- (G-)10⁹: mega-
(M-) 10⁶: kilo- (k-)10³: hecto- (h-)10²: deka- (da-)**10:
deci- (d-)10⁻¹: centi- (c-)10⁻²: milli- (m-)10⁻³: micro- (µ-
)10⁻⁶: nano- (n-)10⁻⁹: pico- (p-)10⁻¹²: femto- (f-)
10⁻¹⁵: atto- (a-)10⁻¹⁸: zepto- (z-)10⁻²¹: yocto- (y-)10⁻²⁴
Dilution of Solutions - correct answer M1V1=M2V2
Molarity - correct answer Moles of solute per liter of solvent.
, ANALYTICAL CHEMISTRY
Molality - correct answer Moles of solute per kilogram of
solvent.
Titration - correct answer A solution of known concentration is
used to determine the concentration of another solution.
Titrant - correct answer A titrant is a chemical reagent with
known concentration, which is added to the analyte
during the process of titration, in order to calculate the
concentration of the analyte in the solution.
The Equivalence Point - correct answer Point in a titration when
there are "equivalent" amounts of titrant and analyte.
Standard Solution - correct answer The titrant (solution
concentration known with high accuracy).
End Point - correct answer Point in a titration when some
noticeable signal indicates equivalence point. The END
point and EQUIVALENCE point may not be the same.
ANALYTICAL CHEMISTRY EXAM 1 QUESTIONS AND ANSWERS
What does an analytical chemist do? - correct answer
Identifying what is in an unknown is called qualitative
analysis. Identifying how much is present is called
quantitative analysis.
Describe the steps in a chemical analysis. - correct answer 1)
What do you want to know? -What substance (analyte)
are you looking for? 2) Select appropriate procedures -
Literature Search -New Procedure 3) Gathering
Representative Samples -Random heterogeneous
material-Segregated heterogeneous material
4) Preparing Samples for Analysis 5) The Actual Analysis
6) Setting Up Calibration Curves 7) What Do The Results
,ANALYTICAL CHEMISTRY
Mean? 8) Reporting your Results-A complete report,
including a discussion of the limitations of the data and
the analysis. 9) Drawing Conclusions-how can this
Information be used
SI units - correct answer meter m: kilogram kg: second s:
current ampere A: temperature kelvin K: candela cd:
mole mol:
Prefixes - correct answer yotta- (Y-) 10²⁴: zetta- (Z-)10²¹: exa- (E-
) 10¹⁸: peta- (P-)10¹⁵: tera- (T-)10¹²: giga- (G-)10⁹: mega-
(M-) 10⁶: kilo- (k-)10³: hecto- (h-)10²: deka- (da-)**10:
deci- (d-)10⁻¹: centi- (c-)10⁻²: milli- (m-)10⁻³: micro- (µ-
)10⁻⁶: nano- (n-)10⁻⁹: pico- (p-)10⁻¹²: femto- (f-)
10⁻¹⁵: atto- (a-)10⁻¹⁸: zepto- (z-)10⁻²¹: yocto- (y-)10⁻²⁴
Dilution of Solutions - correct answer M1V1=M2V2
Molarity - correct answer Moles of solute per liter of solvent.
, ANALYTICAL CHEMISTRY
Molality - correct answer Moles of solute per kilogram of
solvent.
Titration - correct answer A solution of known concentration is
used to determine the concentration of another solution.
Titrant - correct answer A titrant is a chemical reagent with
known concentration, which is added to the analyte
during the process of titration, in order to calculate the
concentration of the analyte in the solution.
The Equivalence Point - correct answer Point in a titration when
there are "equivalent" amounts of titrant and analyte.
Standard Solution - correct answer The titrant (solution
concentration known with high accuracy).
End Point - correct answer Point in a titration when some
noticeable signal indicates equivalence point. The END
point and EQUIVALENCE point may not be the same.
