When dissolving copper in nitric acid, copper(II) ions produce a blue-colored solution. It is possible to determine the concentration of copper(II) ions, focusing on the hue of the color, using a smartphone camera. A free app can be used to measure the hue of the solution, and with the help of standard copper(II) solutions, one can graph a calibration curve to determine the concentration of copper in solution and calculate the mass of copper that has been dissolved or, for example, the percentage of copper in an alloy.
No takes yet. Share an insight, caveat, or question.
Marc Montangero (2015) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: