For some reason, simply solving the equation for X (concentration) using the absorbance value of Y does not seem to make sense for me. Would someone be willing to walk me through the calculations needed to determine the quantity of lead in the sample, and in weight percent?
How would the presence of a white solid in a solution effect the solution's absorbance? Explain how sulfate ion (as an example of an anion) can be analyzed via EDTA titration. In a TLC experiment, how to determine which R_f values for the spots...
When conducting a scientific experiment it is necessary to know that you have the correct concentration of the different chemicals involved. It is also important to be able to calculate concentration in order to determine how much of a reactant has been used up in a reaction or how much produ...
The most common technique to determine DNA yield and purity is measurement of absorbance. Although it could be argued that fluorescence measurement is easier, absorbance measurement is simple, and requires commonly available laboratory equipment. All that is needed for the absorbance ...
Find the equation of the line passing through (-3,4) and parallel to the x-axis. What is a linear expression? How do you graph a piecewise function? What is the value of y-x, if x+2=y? How can one determine if an ordered pair is a solution to an equation?
In this video, you will learn how to determine the color of a sample with our UV/VIS Excellence spectrophotometers. We will demonstrate this analysis with the color determination of an electrolyte. As decomposition progresses, the color of the electrolyte turns yellowish. Therefore, we will ...
Determine the absorbance for the compound at the desired wavelength. This information may be extracted from the absorbance spectrum produced by any standard UV-Vis instrument. The spectra are normally plotted as absorbance vs. wavelength in nanometers. Generally, the appearance of any "peaks" in th...
Explain how you could experimentally determine whether the outside temperature is higher or lower than 0^\circ C (32^\circ F) without using a thermometer. Why do metals conductivity rate reduces with increase in temperature? Why does the ratio of anti-Stokes to...
absorbance from the content of metal ion dependence.then the test solution, the same rate and in the same quantity as the standard solution, uv vis absorption spectrum is measured, from which read absorbance values, with the same wavelength as in standard solution and calibration curve read ...
Describe the method used by scientists to determine the age of the Earth. Approximately how old is the Earth? Can the EMIT be used to measure the concentration of drugs in urine samples? Explain. How does size chromatography work? Why did we calculate, rather than measure, the diameter of ...