Why use aluminum thin film as the positive electrode current collector and copper thin film as the negative electrode cu...
Homework Answers
Ans :
There are two basic criterias that are considered while choosing metals for electrodes : their potential stability and their electrical conductivity.
For cathode , the potential must be in the range of 3 - 4.7 with respect to Li , and aluminium has an oxidation potential of 4.7 so it is suitable for positive electrode current collector.
Likewise for anode , the potential with respect to Lithium must be in the range of 0.5- 2.5 , and copper has 2.7 , hence suitable for negative electrode current collector.
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Why use aluminum thin film as the positive electrode current collector and copper thin film as the negative electrode cu...
A thin film of aluminum has length 1 cm, width 1 mm and thickness 1000 angstroms....
A thin film of aluminum has length 1 cm, width 1 mm and thickness 1000 angstroms. A 50 mA current is flowing along the length of this film. What will be the Hall voltage developed across the width of this sample when a magnetic field of 1 tesla is applied perpendicular to the plane of the film? The carrier concentration in aluminum is 2 x 10"/cm'. Please give your answer in SI units.
salt bridge Zn(s) electrode Culs) electrode 1.0M Zn (a 1.0 M Cu (aq A voltaic cell...
salt bridge Zn(s) electrode Culs) electrode 1.0M Zn (a 1.0 M Cu (aq A voltaic cell similar to that shown in the figure above is constructed. The electronic device shown at the top of the figure is a volt meter. One electrode compartment consists of a zinc strip placed in a 1.0 M ZnCl2 solution, and the other has a copper strip placed in a 1.0 M CuSOA solution. The overall cell reaction is: Zn(s)Cu2+(aq)= zn2+ (aq ) Cu (s)...
salt bridge ME Cr(s) electrode Cu(s) electrode 1.0 M Cr3+ (aq) 1.0 M Cu2+ (aq) A...
salt bridge ME Cr(s) electrode Cu(s) electrode 1.0 M Cr3+ (aq) 1.0 M Cu2+ (aq) A electrolytic cell similar to that shown in the figure above is constructed. The electronic device shown at the top of the figure is a power supply. One electrode compartment consists of a chromium strip placed in a 1.0 M CrCl3 solution, and the other has a copper strip placed in a 1.0 M CuSO4 solution. The overall cell reaction is: 2 Cr3+ (aq) +...
b. Remembering that aluminum is protected from corrosion by a thin film of Al 0s, explain...
b. Remembering that aluminum is protected from corrosion by a thin film of Al 0s, explain your observations in terms of the relative solubility rates of Al2Os in a 6 M HCI solution versus a 6 M KOH solution.
Explain why narrower stripping waves are obtained at a mercury film electrode (MFE) than at an...
Explain why narrower stripping waves are obtained at a mercury film electrode (MFE) than at an HMDE.
1- A 5.6 A current runs through copper wire of diameter 2.06 mm. Copper has 8.5...
1- A 5.6 A current runs through copper wire of diameter 2.06 mm. Copper has 8.5 × 1028 free electrons per cubic meter. At what speed does a typical electron pass by any given point in the wire? (Give your answer in scientific notation using m/s as unit) 2-Current passes through a solution of sodium chloride. In 0.8 s, 2.51 × 1016 Na+ ions arrive at the negative electrode and 3.95 × 1016 Cl- ions arrive at the positive electrode....
The default setting is a thin film of glass(n = 1.5) with air (n = 1)on...
The default setting is a thin film of glass(n = 1.5) with air (n
= 1)on both sides.The starting wavelength is 652 nm and the
starting thickness is 544 nm. Use these starting values for this
next set of questions.
1. Is there a phase shift on the front (left) interface? On the
back (right) interface in the simulation?Justify why there is/isn’t
a phase shift at each interface.
2. How does the wavelength in the film (glass) compare to the...
1. (3 points) A capacitor consisting of rolled insulator and metal thin strips needs to have a ca- pacitance of 20 nF. The positive and negative terminals are attached to two separate aluminum strips...
1. (3 points) A capacitor consisting of rolled insulator and metal thin strips needs to have a ca- pacitance of 20 nF. The positive and negative terminals are attached to two separate aluminum strips, which act as the parallel plates, and paper, which acts as the insulator is inserted between these. For paper, e 3.5o, and the thickness is 0.050mm. Find the required length of the layered aluminum/paper strip. The width of the layered aluminum/paper strip is 2.0cm. Note that...
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current...
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 49.2 A. The resistance per unit length is to be 0.172 Ω/km. The densities of copper and aluminum are 8960 and 2600 kg/m3, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length λ for a copper cable and (c) J and (d) λ for an aluminum cable.
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current...
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 59.0 A. The resistance per unit length is to be 0.181 Ω/km. The densities of copper and aluminum are 8960 and 2600 kg/m3, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length λ for a copper cable and (c) J and (d) λ for an aluminum cable.
A thin film of aluminum has length 1 cm, width 1 mm and thickness 1000 angstroms. A 50 mA current is flowing along the length of this film. What will be the Hall voltage developed across the width of this sample when a magnetic field of 1 tesla is applied perpendicular to the plane of the film? The carrier concentration in aluminum is 2 x 10"/cm'. Please give your answer in SI units.
salt bridge Zn(s) electrode Culs) electrode 1.0M Zn (a 1.0 M Cu (aq A voltaic cell similar to that shown in the figure above is constructed. The electronic device shown at the top of the figure is a volt meter. One electrode compartment consists of a zinc strip placed in a 1.0 M ZnCl2 solution, and the other has a copper strip placed in a 1.0 M CuSOA solution. The overall cell reaction is: Zn(s)Cu2+(aq)= zn2+ (aq ) Cu (s)...
salt bridge ME Cr(s) electrode Cu(s) electrode 1.0 M Cr3+ (aq) 1.0 M Cu2+ (aq) A electrolytic cell similar to that shown in the figure above is constructed. The electronic device shown at the top of the figure is a power supply. One electrode compartment consists of a chromium strip placed in a 1.0 M CrCl3 solution, and the other has a copper strip placed in a 1.0 M CuSO4 solution. The overall cell reaction is: 2 Cr3+ (aq) +...
b. Remembering that aluminum is protected from corrosion by a thin film of Al 0s, explain your observations in terms of the relative solubility rates of Al2Os in a 6 M HCI solution versus a 6 M KOH solution.
The default setting is a thin film of glass(n = 1.5) with air (n
= 1)on both sides.The starting wavelength is 652 nm and the
starting thickness is 544 nm. Use these starting values for this
next set of questions.
1. Is there a phase shift on the front (left) interface? On the
back (right) interface in the simulation?Justify why there is/isn’t
a phase shift at each interface.
2. How does the wavelength in the film (glass) compare to the...
1. (3 points) A capacitor consisting of rolled insulator and metal thin strips needs to have a ca- pacitance of 20 nF. The positive and negative terminals are attached to two separate aluminum strips, which act as the parallel plates, and paper, which acts as the insulator is inserted between these. For paper, e 3.5o, and the thickness is 0.050mm. Find the required length of the layered aluminum/paper strip. The width of the layered aluminum/paper strip is 2.0cm. Note that...
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