Colorimetry and spectrophotometry

Colorimetry uses the relationship between colour intensity of a solution and the concentration of the coloured species present.

• TRUE

• FALSE

What happens to Absorbance when the Concentration increases?

• stays the same

• increases

• decreases

Tags

NGSS.HS-PS1-5

How to determine the concentration of the tested solution?

• use absorbance and the calibration graph

• use your eye to analyse the intensity of colour and estimate the concentration

• prepare standard solutions of different concentrations trying to get the same colour as the tested solution

What does 'Abs' stand for on this graph?

• absorption

• absorbance

• abdominal muscles

• anti-lock braking system

Cuvette of Colorimeter is made of-

• Alkali halide

• Quartz

• Glass

• All of these

Tags

NGSS.MS-PS4-2

Colorimeter measures the optical density for-

• Colored sample

• Colorless samples

• Both colored & Colorless sample

• None of these

which of the following are same?

• Optical Density & Wavelength

• Optical Density & Transmittance

• Optical Density & Absorbance

• Optical Density & specific absorbance

Which of the following is a source used in spectroscopy?

• a) LASER

• b) Tube light

• c) Sodium vapour lamp

• d) Tungsten lamp

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Molar Extinction Coefficient depends on-

• Absorbance

• Concentration

• Path Length

• All of these

Drawing of calibration curve can be done by taking which of the following in X-axis?

• Concentration

• Absorbance

• Optical density

• Transmittance