Map do Sapling Learning Refer to the following Absorbance spectrum to answer the
ID: 697345 • Letter: M
Question
Map do Sapling Learning Refer to the following Absorbance spectrum to answer the following questions: 1.6 De All solutons contain 0.010 MHC What is the approximate absorbance of benzoic acid at 228 nm? 14 Po 12 Number Yo 1.0 Benzoic acid Absorbance Yot unt Mountain Dew soda 150 dludon 06 What is the molar absorptivity of benzoic acid at 228 nm? (assume path length 1 cm) ans atter Number 02 DeTe 200 220 240 260 300 O Help Spectra of caffeine, benzoic acid, and a mountain dew sample in 0.10 M HCL DWeb i O Provious Give Up & View Soleon ) Check Answer Next O Techn Exit HintExplanation / Answer
a)
from the given graph :
Approximate Absorbance = 0.8
b)
concentration = 8.74 mg / L
= 8.74 x 10^-3 g / L
= 8.74 x 10^-3 / 122
= 7.16 x 10^-5 M
A = e b C
0.80 = e x 1 x 7.16 x 10^-5
e = 11167 M-1 cm-1
Molar absorptivity = 11167 M-1 cm-1