Analytical Chemistry Exam 1 2025
Questions and Answers
(Determine if it is a quantitative or qualitative analysis) A scientist analyzes a
sample of ground water to determine which heavy metals have contaminated the
source - --Answer --Qualitative
(Determine if it is a quantitative or qualitative analysis) A scientist analyzes a
sample of ground water to determine the amount of lead present - --
Answer --Quantitative
(Determine if it is a quantitative or qualitative analysis) A pharmaceutical
technician analyzes the product of an experiment to see how much active
ingredient in a new medication was produced - --Answer --Quantitative
(Determine if it is a quantitative or qualitative analysis) A pharmaceutical
technician analyzes the product of an experiment to see if any side reactions have
occurred. - --Answer --Qualitative
a portion of a sample - --Answer --aliquot
a solution whose composition is accurately known - --Answer --Standard
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,the substance being measured - --Answer --analyte
a liquid remaining above a solid after precipitation - --Answer --supernatant
a suspension of a solid in a solvent - --Answer --slurry
in water - --Answer --aqueous
What are the six steps of the analytical process? - --Answer --1. Formulate a
question
2. Select an analytical procedure
3. Obtain representative sample
4. Sample preparation
5. Chemical analysis
6. Result interpretation and draw conclusions
the substance in interest in a chemical analysis - --Answer --analyte
a portion of sample used for analysis - --Answer --sample
all substances found within a material - --Answer --Matrix
(Identify the sample and analyte in each scenario) Determination of lead content in
paint - --Answer --Sample: Paint
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, Analyte:Lead
(Identify the sample and analyte in each scenario) Analysis of the nitrate content of
soil near a local water source - --Answer --Sample: Soil
Analyte: Nitrate
(Identify the sample and analyte in each scenario) Measurement of citric acid found
in a lime - --Answer --Sample: Lime wedge
Analyte: Citric acid
(Identify as either a hypothesis, law, or theory) An untested explanation - --
Answer --Hypothesis
(Identify as either a hypothesis, law, or theory) A botanist guesses, but has not
verified, why plants with one red-flowered and one white-flowered parent have
pink flowers - --Answer --Hypothesis
(Identify as either a hypothesis, law, or theory) An explanation that has been tested
and verified - --Answer --Theory
(Identify as either a hypothesis, law, or theory) Scientist, after many experiments
explain conservation of mass by stating that matter is composed of atoms - --
Answer --Theory
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Questions and Answers
(Determine if it is a quantitative or qualitative analysis) A scientist analyzes a
sample of ground water to determine which heavy metals have contaminated the
source - --Answer --Qualitative
(Determine if it is a quantitative or qualitative analysis) A scientist analyzes a
sample of ground water to determine the amount of lead present - --
Answer --Quantitative
(Determine if it is a quantitative or qualitative analysis) A pharmaceutical
technician analyzes the product of an experiment to see how much active
ingredient in a new medication was produced - --Answer --Quantitative
(Determine if it is a quantitative or qualitative analysis) A pharmaceutical
technician analyzes the product of an experiment to see if any side reactions have
occurred. - --Answer --Qualitative
a portion of a sample - --Answer --aliquot
a solution whose composition is accurately known - --Answer --Standard
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,the substance being measured - --Answer --analyte
a liquid remaining above a solid after precipitation - --Answer --supernatant
a suspension of a solid in a solvent - --Answer --slurry
in water - --Answer --aqueous
What are the six steps of the analytical process? - --Answer --1. Formulate a
question
2. Select an analytical procedure
3. Obtain representative sample
4. Sample preparation
5. Chemical analysis
6. Result interpretation and draw conclusions
the substance in interest in a chemical analysis - --Answer --analyte
a portion of sample used for analysis - --Answer --sample
all substances found within a material - --Answer --Matrix
(Identify the sample and analyte in each scenario) Determination of lead content in
paint - --Answer --Sample: Paint
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, Analyte:Lead
(Identify the sample and analyte in each scenario) Analysis of the nitrate content of
soil near a local water source - --Answer --Sample: Soil
Analyte: Nitrate
(Identify the sample and analyte in each scenario) Measurement of citric acid found
in a lime - --Answer --Sample: Lime wedge
Analyte: Citric acid
(Identify as either a hypothesis, law, or theory) An untested explanation - --
Answer --Hypothesis
(Identify as either a hypothesis, law, or theory) A botanist guesses, but has not
verified, why plants with one red-flowered and one white-flowered parent have
pink flowers - --Answer --Hypothesis
(Identify as either a hypothesis, law, or theory) An explanation that has been tested
and verified - --Answer --Theory
(Identify as either a hypothesis, law, or theory) Scientist, after many experiments
explain conservation of mass by stating that matter is composed of atoms - --
Answer --Theory
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
