Narrower stripping waves are obtained at the Mercury film electrode (MFE) than at HMDE because the Mercury film electrodes h(MFE)l surface to volume ratio than hanging Mercury drop electrodes (HMDE).
Explain why narrower stripping waves are obtained at a mercury film electrode (MFE) than at an...
Why use aluminum thin film as the positive electrode current collector and copper thin film as the negative electrode current collector?
Explain why it is generally more preferred to use a three-electrode system (composed of working, counter, and reference electrodes) than a two-electrode system in electrochemical analysis. Also explain the role of working, counter, and reference electrodes, respectively, in a three-electrode system.
A soap film is viewed in white light. If the film is much thinner than the wavelength of blue light, what is the appearance of the film? a) The soap film appears blue because all others colors are transmitted. b) The soap film appears red because all other colors are transmitted. c) The soap film appears white because it reflects all wavelengths of visible light. d) The soap film appears totally transparent because it reflects no visible light. Please explain...
Explain why in pressure waves the nodes are at the begining and end of an open-open pipe and why displacment waves are the oposite.
9. (a) Describe the difference between galvanic and electrolytic cells (5 pt) (b) Explain why it is generally more preferred to use a three electrode system (composed of working, counter, and reference electrodes) than a two electrode system in electrochemical analysis. Also explain the role of working, counter, and reference electrodes, respectively, in a three electrode system. (10 pt) 9. (a) Describe the difference between galvanic and electrolytic cells (5 pt) (b) Explain why it is generally more preferred to...
(a) Explain why mercury biomagnification in an aquatic ecosystem could occur because of the local man-made hydrological changes and without any external source of mercury contamination. (b) Every year mercury concentration on the surface now in the Arctic increases rapidly during the spring and early summer. Describe the chemical process that contributes to this mercury deposition and explain how this process alters chemical speciation of mercury. (c) Explain how the physico-chemical characteristics of different chemical forms of mercury influence their...
30. Why are the Balmer lines in the spectra of giant stars narrower than those for main-sequence stars? 31. Binary stars are [common, very rare]. 32. Binary stars allow us to determine what very important property of stars? 33. In a binary system the center of mass lies closer to the [more massive, less massive] star. 34. What type of star is Sirius B? [main sequence, white dwarf, giant] 35. Why does a spectroscopic binary system only allow us to...
1. Explain why for (non-magnetic materials) there is a Brewster angle for TM waves, but not for TE waves. (Hint: use Snell's Law and the expressions for「E and「M-) Will the situation change when you have a magnetic material (ie, when 14-# 1)? 1. Explain why for (non-magnetic materials) there is a Brewster angle for TM waves, but not for TE waves. (Hint: use Snell's Law and the expressions for「E and「M-) Will the situation change when you have a magnetic material...
Why are polyaniline nanofibres more porous and have higher surface area than thin film polyaniline?
why are salts, rather than only neutral organic molecules, obtained from saponification of a triglyceride