Question

QUESTION 9 What wavelenght light do the pigments in red wine transmit predominantly? 620-750 nm 380 440 nm 440-450 nm 450-495 nm QUESTION 10 We are going to do an analysis of copper (II) using spectroscopy. We gather transmission data for the blank and the standard. The %T for BLANK is 95.0 and 99.0% The %T's for STANDARD are 24.0 and 26.0% What is the absorbance of the standard?

Answer 1

ишF от и 1. The wavelength for red light in electromagnetic spectrum is between - 650 700 nm. Hence, correct option is 620-750 nm. 1 2) Relation between AO Absorbance and Transmittance is A = -log(75) . for standard ; A = 2awg (24) = 0.62 and A's dolog 126) = 0.58. (Ang )