The lowest concentration that is still expected to be in the linear range of a calibration plot can be determined using the equation c = A / (Ɛb), where A is the absorbance, Ɛ is the molar absorptivity, and b is the path length.
The lowest concentration of the compound that is still expected to be in the linear range of a calibration plot can be determined using the equation for molar absorptivity, which is A = Ɛbc. In this equation, A is the absorbance, Ɛ is the molar absorptivity, b is the path length (given as 1 cm), and c is the concentration of the compound. To find the lowest concentration, we can rearrange the equation to solve for c: c = A / (Ɛb).
Since the question does not provide specific values for A and Ɛ, we cannot calculate the exact concentration. However, we can determine the lowest concentration that is still within the linear range of the calibration plot by considering the range of absorbance values that can be reliably measured. Typically, absorbance values between 0.1 and 1.0 are considered within the linear range. Therefore, the lowest concentration of the compound that would still be expected to be in the linear range of the calibration plot would be a concentration that yields an absorbance value within this range when plugged into the equation c = A / (Ɛb).
The complete question is-Concentration (M) If a compound has ε=550 cm −1 M−1 , what is the lowest concentration of the compound that is still expected to be in the linear range of a calibration plot? Assume a cuvette with a path length of 1 cm. Report your answer in M, but do not include units in your answer. Scientific notation can be used with "E". For example, report "1.7 ×10 −3"as "1.7E-3"