The following data were collected for a series of cobalt(II) nitrate standards at 510…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
The following data were collected for a series of cobalt(II) nitrate standards at 510 nm using a 1.00 cm cuvette.
Concentration (M): 0.0020, 0.0040, 0.0060, 0.0080
Absorbance: 0.150, 0.300, 0.450, 0.600
An unknown cobalt(II) sample measured under identical conditions has an absorbance of 0.375. What is the concentration of the unknown?
(a) 0.0040M
(b) 0.0050M
(c) 0.0075M
(d) 0.0025M