How would one be able to identify the lambda max of Cr(III) at a concentration less than 70ppm from a graph? I couldn't post the graph, but I don't understand how one would be able to do this? Can you please justify the answer with an explanation? I would want to know how and why...
The graph had the Chromium Absorbance Spectra of 70ppm for Cr(VI) and Cr(III). Cr(VI) intersects the curve for Cr(III) at one point.
It is possible to detect Cr(III) in the presence of Cr(VI) using a lambda max of 560-580nm.
Cr(VI) exhibits 2 absorption bands, one with lambda max of 348nm and a 2nd broader band with lambda max of 435nm.
Cr(III) has 2 absorption bands one with lambda max of 405nm and one with lambda max of 576nm.
To identify the lambda max of Cr(III) at a concentration less than 70ppm from the given graph, you can follow these steps:
1. First, you need to understand what lambda max represents. Lambda max (λ max) is the wavelength at which a substance absorbs light the most strongly. In the context of the given graph, it represents the wavelength at which Cr(III) absorbs light most strongly.
2. Look at the graph and locate the intersection point between the curve for Cr(III) and Cr(VI). This intersection point indicates the wavelength at which both Cr(VI) and Cr(III) absorb light to a similar extent.
3. Check the provided information about the absorbance spectra of Cr(VI) and Cr(III). It states that Cr(III) has two absorption bands with lambda max values of 405nm and 576nm.
4. Examine the graph to find a point where the curve for Cr(III) intersects with the range of 560-580nm. This intersection point, within the specified range, would correspond to the lambda max for Cr(III) at a concentration less than 70ppm.
5. Compare this lambda max value obtained from the graph with the lambda max values given for Cr(III) in the provided information. If the obtained lambda max falls within the range of lambda max values for Cr(III) given (405nm and 576nm), then you have successfully identified the lambda max.
Note: Since the graph wasn't provided, it is challenging to give specific instructions based on its content. However, the general approach mentioned above should help you identify the lambda max of Cr(III) at a concentration less than 70ppm from the graph using the given information.