Instrumental Analysis for Salts (VCE SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is an advantage of colorimeters over traditional lab methods?
What is an advantage of colorimeters over traditional lab methods?
They measure very low concentrations
What is the wavelength range of visible light used in colorimetry?
What is the wavelength range of visible light used in colorimetry?
nm to nm
A solution appears purple. What color of light does it absorb?
A solution appears purple. What color of light does it absorb?
Yellow-green
Using ROYGBV/GBVROY, what is the complementary color to orange?
Using ROYGBV/GBVROY, what is the complementary color to orange?
Blue
What filter should be used to analyze a solution that appears purple?
What filter should be used to analyze a solution that appears purple?
Yellow-green filter
In a calibration curve, what goes on the x-axis?
In a calibration curve, what goes on the x-axis?
Concentration
What is the absorbance range on a colorimeter?
What is the absorbance range on a colorimeter?
to
What does a monochromator do in UV-visible spectrophotometers?
What does a monochromator do in UV-visible spectrophotometers?
Splits white light into individual wavelengths
Why must ions form a complex with phenanthroline?
Why must ions form a complex with phenanthroline?
They don't absorb visible light strongly enough
What formula calculates salt concentration in soil?
What formula calculates salt concentration in soil?
(conc. × volume of extract) / mass of soil