Chapter 0 – The Analytical Process 1
Quantitative Chemical Analysis 9th Edition Harris
Test Bank
Multiple-Choice
- chemical analysis is the measurement of how much of a chemical
substance is present. chemical analysis is the determination of what is present in
a sample.
A) Quantitative; Qualitative
B) Stoichiometric; Qualitative
C) Qualitative; Quantitative
D) Stoichiometric; Identification
E) Quantitative; Identification
Answer: A
Easy
0-1 The Analytical Chemist’s Job - A sample with a uniform chemical composition is a sample.
A) homologous
B) homogeneous
C) uniform
D) consistent
E) heterogeneous
Answer: B
Easy - A(n) sample is a sample where the chemical composition differs from
place to place.
A) variable
B) homogeneous
C) random
D) inconsistent
E) heterogeneous
Answer: E
Easy
Chapter 0 – The Analytical Process 2
- When extracting a sample with a liquid, the liquid is from the sample.
A) transferred
B) drained
C) decanted
D) effused
E) dispensed
Answer: C
Easy - A(n) is used to grind solids into smaller particles.
A) orbital shaker
B) vortexer
C) mixer
D) mortar and pestle
E) centrifuge
Answer: D
Easy - is the substance being measured during a chemical analysis.
A) Bulk
B) Lot
C) Sample
D) Analyte
E) Aliquot
Answer: D
Easy - The liquid above the packed solid following a centrifugation is the .
A) solvonatant
B) analyte
C) serum
D) decanted
E) supernatant
Answer: E
Easy
Chapter 0 – The Analytical Process 3
- A(n) is a suspension of a solid in a liquid.
A) slurry
B) colloid
C) gel
D) supernatant
E) allotrope
Answer: A
Easy - is the series of procedures applied to a sample prior to analysis.
A) Pre-analysis clean up
B) Sample preparation
C) Filler elimination
D) Matrix removal
E) Lot cleaning
Answer: B
Easy - For separations, the plot of detector response versus time is a(n) and
the area under the peak is to the quantity of compound passing through the
detector.
A) column plot; proportional
B) column plot; inversely proportional
C) chromatogram; proportional
D) chromatogram; inversely proportional
E) absorbance spectrum; proportional
Answer: C
Easy
Chapter 0 – The Analytical Process 4
- A(n) is a plot of detector response as a function of analyte
concentration. The curve is constructed using containing known
concentrations of the analyte of interest.
A) analyte curve; response solutions
B) response curve; standard solutions
C) analyte curve; analyte solutions
D) calibration curve; standard solutions
E) response curve; response solutions
Answer: D
Easy - is the process of procuring a representative sample to analyze.
A) Inspection
B) Examination
C) Representation
D) Sampling
E) Partaking
Answer: D
Easy - Solid-phase extraction is a sample preparation technique. Which of the following
statements is(are) NOT true for an aqueous solid-phase extraction?
I Solid-phase extraction separates analyte from the sample matrix using a chromatography
stationary phase.
II An aliquot of the aqueous sample is applied to the solid-phase extraction tube, washing
the sample with additional sample and then a water wash.
III The analyte sticks to the column and the water wash removes all species that do not
adhere to the column.
IV An organic solvent is used to wash the analyte from the column.
V The organic phase containing the analyte is evaporated to dryness and the solid is
dissolved in water, ready for analysis.
A) III
B)I
C) II and III
D) IV
E)II
Answer: E
Easy