Ex 4

Part of the Duboscq Colorimeter where the readings are viewed or obtained

• Glass plunger

• Mirror

• Eyepiece

• Scales

What is the relationship between the concentration and the depth/distance/L

• Directly proportional

• Inversely proportional

• No relastionship

What is the light source used in Duboscq colorimeter?

• Tungsten lamp

• Natural light

• Light-emitting diode

• Deuterium

TRUE OR FALSE: Standard solution is placed on the left hand cup as the unknown is placed in the right hand cup

• True

• False

True or False: Optical Density is another term for absorbance

• TRUE

• FALSE

Light source of spectrophotometer

• Tungsten Lamp

• Natural Light

• Stray Light

• Light-emitting diode

What is the optimum temperature when warming up a spectrophotometer?

• Room temperature

• 37C

• 45C

• Ref temperature

Refers to any wavelength of light outside the band transmitted and selected by the monochromator/ as other than the dial is set

Is a measure of the amount of light stopped or absorbed by a solution

• Concentration

• Transmittance

• Absorbance

In the meter reader in a spectrophotometer, the red scale is for?

• Absorbance

• %Transmittance

• Errors

• Wavelength dial window