Phenel Red,a solution commonly used in science labs, has a strong red color. Ans

Question

Phenel Red,a solution commonly used in science labs, has a strong red color. Answer the following questions about the light and color properties of phenol red Color Wavelength (om) Phenol Red reflects ight of what wavelength range (1/2 point) 60 17 an 476 495 range 0 Phenal Red absorbs light of what wavelength 11/2 point True or False: (Cirele one) Green 4956 Yelow 670-590spectrophetometer, the machine should be set to emit light at a wavelength Te measure the concentration of phenol red in a solution usinga between 620-750mm.(1 point 90 620 After Transfer

Explanation / Answer

7)
Phenol red reflects light of what wavelength
range 620 -750 nm
Phenol red absorbs light at what wavelength
range 570 - 590 nm

True or False
To measure the concentration of phenol red in a solution using a spectrophotometer machine should be set to emit light at a wavelength between 620 - 750 nm

Explanation: Phenol red solution absorbs light wavelength between 570 - 590 nm. If we emit a light of 620 -750 nm at the red solution it won't get absorbed and there would be no emission spectra detected.

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