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Worksheetsanalytical chemistry long quiz
Total questions: 50
Worksheet time: 29mins
TRUE OR FALSE: Analytical Chemistry is often described as the area of chemistry responsible for characterizing composition of matter.
TRUE
FALSE
What do you call the science of inventing and applying the concepts, principles and strategies for measuring the characteristics of chemical systems?
Biochemistry
Organic Chemistry
Analytical Chemistry
Electrochemistry
Aspect of analytical chemistry that begins with the need to identify what is present in the sample.
quantitative analysis
qualitative analysis
Analysis that includes elemental analysis of a newly synthesized compound and measuring the concentration.
quantitative analysis
qualitative analysis
characterization analysis
fundamental analysis
It is an analysis directed towards improving the experimental methods used in the other areas of analytiacl chemistry.
quantitative analysis
qualitative analysis
characterization analysis
fundamental analysis
Which of the following laboratory equipment is the best to use in measuring a 10 mL liquid?
beaker
graduated cylinder
pippette
test tube
Which of the following lab apparatus measures temperature?
Weighing scale
thermometer
beaker
pH meter
Which of the following statements is correct?
When holding or heating a test tube, point it toward yourself or anyone else.
If you break glassware, notify your instructor to receive a replacement
Purses, backpacks, coats, etc. should be moved to the working area designated by your instructor to prevent chemicals being spilled on them.
When diluting acids, always add the water to acid.
Which apparatus protects the eyes from flying objects or chemical splashes?
beaker
graduated cylinder
goggles
gloves
It provides chemical or physical information about a sample.
analysis
analyte
matrix
chemicals
The component of interest in the sample is:
analysis
analyte
matrix
chemicals
The remainder of the sample is the:
analysis
analyte
matrix
chemicals
A ___________ is any chemical or physical principle we can use to study an analyte.
technique
method
procedure
protocols
A _________ is the application of a technique for a specific analyte in a specific matrix.
technique
method
procedure
protocol
A _________ is a set of written directions telling us how to apply a method to a particular sample, including information on obtaining samples, handling interferents, and validating results.
technique
method
procedure
protocol
A __________ is a set of stringent guidelines specifying a procedure that must be followed if an agency is to accept the results.
technique
method
procedure
protocol
What is the volume of the liquid in the picture
35 mL
35 grams
35 cm3
35 L
What tool is used to measure mass?
Graduated cylinder
Meter stick
Beaker
Digital electronic balance
The term molar, which describes a solution's concentration, is written as?
M
mol
g
g/L
Molarity is ...
grams of solute/deciliters of solvent.
grams of solute/liters of solution.
moles of solute/liters of solution.
moles of solute/milliliters of solvent.
Identify the lab equipment in the picture
evaporating dish
watch glass
mortar and pestle
funnel
Identify the lab equipment in the picture
evaporation
watch glass
mortar and pestle
funnel
Identify the equipment in the picture.
wire gauze
Bunsen burner
thermometer
utility clamp
Identify the equipment in the picture.
evaporating dish
watch glass
mortar and pestle
funnel
Identify the equipment in the picture.
scoopula
dropper
crucible tongs
glassware tongs
Identify the equipment in the picture.
beaker
graduated cylinder
Erlenmeyer flask
test tube
Identify the equipment in the picture.
scoopula
dropper
crucible tongs
glassware tongs
__________ is how closely the result of an experiment agrees with the “true” or expected result.
Accuracy
Presision
Sensitivity
Specificity
A method’s ability to demonstrate that two samples have different amounts of analyte is called __________ .
Accuracy
Precision
Sensitivity
Specificity
__________ is a measure of a method’s freedom from interferences.
Sensitivity
Selectivity
Robustness
Ruggedness
When a method is relatively free from chemical interferences, we can use it on many analytes in a wide variety of sample matrices. Such methods are considered __________.
Selective
Specific
Robust
Rugged
A _________ method is relatively insensitive to changes in experimental conditions.
Specific
Sensitive
Robust
Rugged
A __________ , a solution that does not contain the sample
signal
interference
method blank
procedure
_________ is the process of experimentally determining the value of kA by measuring the signal for one or more standard samples, each containing a known concentration of analyte.
Calibration
Precision
Sampling
Validation
What is the molality when 0.75 mole is
dissolved in 2.50 L of solvent?
0.3m
0.3M
0.03m
0.03M
The purpose of an analytical study is to obtain information about some object or substance. the following are the common steps involved in the process. Which is in correct order?
sampling>analysis>sample preservation>sample preparation
sampling>sample preparation>sample preservation>analysis
sampling? sample preservation>analysis>sample preparation
sampling>sample preservation>sample preparation>analysis
The ______________ is a plot of detector response as a function of concentration.
sample
calibration curve
sampling method
protocol
Common steps in sample preservation are:
the use of proper containers,
temperature control
addition of preservatives
observance of recommended sample holding time
(a) refers to activities that demonstrate that a certain quality standard is being met.
(a) refers to the practices and procedures involved in running a laboratory.
(a) refer to the specific techniques in sample preparation and analysis.
(a) are written descriptions of procedures of methods being followed.
(a) are used to assess the degree of contamination in any step of the measurement process. They may also be used to correct relatively constant, unavoidable contamination.
A (a) checks solvents and reagents that are used during sample preparation and analysis.
(a) is a measure of system contamination and is the instrumental response in the absence of any sample.
Round 63,488 to two significant digits
(a)
How many significant figures are there in 0.3760 g?
(a)
Calculate (4.0 x 10^-3)(1.2 x 10^-10)
Express your answer with the correct number of significant figures.
(a)
