ACS FINAL - ANALYTICAL CHEMISTRY WITH 100% RATED
CORRECT REAL EXAM QUESTIONS AND CORRECT ANSWERS|
GRADED A+ |2025 LATEST VERSION | 100% VERIFIED
Qualitative Analysis - (answer)Determines what is in a sample
Quantitative Analysis - (answer)Determines how much is in a sample
What are the steps of chemical analysis? - (answer)Formulate a Question
Select Analytical Procedure
Obtain Representative Sample
Sample Preparation
Analysis
Report Results
Draw Conclusions
What does it mean to mask an interfering species? - (answer)Convert an interfering
species into a noninterfering species
,What is the purpose of a calibration curve? - (answer)Shows the response of an
analytical method as a function of the known concentration of analyte in standard
solutions
Homogeneous Mixture - (answer)Same composition everywhere
Heterogeneous Mixture - (answer)Composition is not uniform
Segregated Heterogeneous Mixture - (answer)Composition varies on a large scale
Random Heterogeneous Mixture - (answer)Composition varies on a fine scale
How would you construct a representative sample from a segregated
heterogeneous mixture? - (answer)Take a representative sample from each of the
obviously different regions
, How would you construct a representative sample from a random heterogeneous
mixture? - (answer)Divide the material into imaginary segments and collect
random segments with the help of a table of random numbers
Why do we use quotation marks around the word true in the statement that
accuracy refers to how close a measured value is to the "true" value? - (answer)All
measurements have some uncertainty, so there is no way to know the true value.
Systematic Error - (answer)Always above or below the "true" value when making
replicate measurements. Theoretically, you could find the source of this error and
eliminate it in a better experiment.
Random Error - (answer)Equally likely to be positive or negative and cannot be
eliminated, only reduced, to improve an experiment.
What type of error would be responsible for a 25-mL transfer pipet consistently
delivering 25.031 +/- 0.0009mL? - (answer)Systematic error
CORRECT REAL EXAM QUESTIONS AND CORRECT ANSWERS|
GRADED A+ |2025 LATEST VERSION | 100% VERIFIED
Qualitative Analysis - (answer)Determines what is in a sample
Quantitative Analysis - (answer)Determines how much is in a sample
What are the steps of chemical analysis? - (answer)Formulate a Question
Select Analytical Procedure
Obtain Representative Sample
Sample Preparation
Analysis
Report Results
Draw Conclusions
What does it mean to mask an interfering species? - (answer)Convert an interfering
species into a noninterfering species
,What is the purpose of a calibration curve? - (answer)Shows the response of an
analytical method as a function of the known concentration of analyte in standard
solutions
Homogeneous Mixture - (answer)Same composition everywhere
Heterogeneous Mixture - (answer)Composition is not uniform
Segregated Heterogeneous Mixture - (answer)Composition varies on a large scale
Random Heterogeneous Mixture - (answer)Composition varies on a fine scale
How would you construct a representative sample from a segregated
heterogeneous mixture? - (answer)Take a representative sample from each of the
obviously different regions
, How would you construct a representative sample from a random heterogeneous
mixture? - (answer)Divide the material into imaginary segments and collect
random segments with the help of a table of random numbers
Why do we use quotation marks around the word true in the statement that
accuracy refers to how close a measured value is to the "true" value? - (answer)All
measurements have some uncertainty, so there is no way to know the true value.
Systematic Error - (answer)Always above or below the "true" value when making
replicate measurements. Theoretically, you could find the source of this error and
eliminate it in a better experiment.
Random Error - (answer)Equally likely to be positive or negative and cannot be
eliminated, only reduced, to improve an experiment.
What type of error would be responsible for a 25-mL transfer pipet consistently
delivering 25.031 +/- 0.0009mL? - (answer)Systematic error
