Dry cell
For the Hard Rock/Heavy Metal band, see Dry Cell (band). ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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~ ~ ~ ~ ~ ~ ~ ~ ~ ~ A dry cell is a compact primary electrochemical cell that supplies electrical energy at small currents. Like all electrochemical cells, it gets its electrical energy from an internal chemical reaction. The cell is wrapped in a sheet of zinc, inside which is a carbon rod. The space between the zinc and the carbon is packed with a mixture of moist chemicals. The cell has two contacts: the positive (+) terminal (or cathode) and the negative (-) terminal (or anode). ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ The anode (-), which is the zinc casing, oxidises according to the following half-equation: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ :Zn(s) → Zn2+(aq) + 2e- ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ The graphite rod, immersed in the electrolyte paste (containing manganese dioxide, MnO2), is the cathode (+) and reduces according to the following half-equation: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ :2MnO2(s) + 2H+(aq) + 2e- → Mn2O3(s) + H2O(l) ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Advantages: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Disadvantages: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Common uses: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Hard Rock: :Hard Rock redirects here. For the restaurant, please see Hard Rock Cafe.... Heavy Metal: Heavy metal may mean:... Band: Band may mean:... Dry cell related Images and Photos (experimental)
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~ Related Subjects ~Zinc (1) - Chemical reaction (1) - Carbon (1) - Anode (1) - Cathode (1) - Electrochemical cell (1) - Heavy Metal (1) - Hard Rock (1) - Band (1) - Primary (1) - Dry Cell (band) (1) -~ Community ~
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