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CWEA grade 1 lab analyst practice test part 2 TEST (questions and answers)complete_.pdf
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8/20/24, 5:54 PMCWEA grade 1 lab analyst practice test part 2
Jeremiah
Terms in this set (50)
Major anion found in many natural waters - Can impart salty taste in H2O
What is chloride?
1 multiple choice option
What increases the concentration of chloride Chloride in human diet and softeners flushed into sanitary sewer system
in wastewater? 2 multiple choice options
2 most prevalent methods of measuring argentometric and mercuric nitrate 2 multiple choice options
chloride?
Titration of the sample with a standard solution of silver nitrate (AgNO3) - Indicator:
What is the Argentometric method? Chromate ions (CrO4) - End point: reddish silver chromate
3 multiple choice options
Titration with standard mercuric nitrate solution -pH must be adjusted between 2.3 and
2.8 - Indicator: Diphenyl carbazone - End point: Change from blue to purple in the
What is the Mercuric Nitrate method?
presence of mercury
3 multiple choice options
Which of the following can be an Sulfide, bromide, orthophosphate (over 30 ppm), and iodide 3 multiple choice options
Interference of the Mercuric Nitrate
Method?
Why does the color change in water? d 3 multiple choice options
a. Presence of decaying vegetable matter
b. metal ions (ie. iron)
c. industrial and domestic pollution
d. All of the above
How is color measured Measured using visual comparison method 1 multiple choice option
Sample compared to standards using matching nessler tubes - Standards prepared
What is the visual comparison method with solution containing chloroplatinate and cobaltous chlorid
2 multiple choice options
What is the standard unit for color? One unit= color resulting from 1 mg of platinum/L 2 multiple choice options
What is 2-color reporting? True and Apparent 1 multiple choice option
Color from suspended solids, determine using sample treated to remove turbidity
Define True color
3 multiple choice options
CWEA
What grade
is Apparent 1 lab
Color? analyst practice test
Color frompart 2
both dissolved and suspended solids 3 multiple choice options
1/3
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