What element is used in electrodes
An electrode may be constructed of metal, such as copper, silver, lead, or zinc. However, an electrode may also be made of a nonmetal substance, such as carbon. ChaCha On! [ Source: http://www.chacha.com/question/what-element-is-used-in-electrodes ]
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- What element is used in electrodes?
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- In a typical old style lead-acid battery (AA,AAA) why is the acid so concentrated? ?
- Q: Why cant you use an element like Na or K as your electrode?What happens at the anode as a voltaic/electrochemical cell runs? Explain why batteries eventually run out. Explain how some batteries can be charged.Thnx for ur help and support!!!!!!!!:-)
- A: The older type AA or AAA batteries or cells are not lead acid batteries or cells. Lead acid batteries are found in cars and can be charged and discharged many times, The disposable AA or AAA cells are zinc/ carbon with ammonium chloride as electrolyte and are not rechargable These primary batteries irreversibly (within limits of practicality) transform chemical energy to electrical energy. When the initial supply of reactants is exhausted, energy cannot be readily restored to the battery by electrical means. The cell is then considered to be discharged and must be disposed of. In contrast modern rechargeable batteries are available in the smaller AA and AAA sizes . A rechargeable battery, also known as a storage battery, is a group of two or more secondary cells. These batteries can be restored to full charge by the application of electrical energy. In other words, they are electrochemical cells in which the electrochemical reaction that releases energy is readily reversible. Rechargeable electrochemical cells are therefore a type of accumulator. They come in many different designs using different chemicals. Commonly used secondary cell chemistries are lead and sulfuric acid (typically large batteries used in cars and trucks, etc), rechargeable alkaline battery (alkaline), nickel cadmium (NiCd), nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer).There is a lot of electrochemical reactions associated with rechargeable batteries. Search any of the web-pages for a description.
- What chemicals result from the electrolysis of pure water using sodium bicarbonate as the electrolyte?
- Q: Need to know the specifics of what elements or molecules will be released at the electrodes and which will remain in the solution.
- A: First things first. It can’t be pure water if it contains sodium bicarbonate.You will produce hydrogen gas and oxygen gas, and the sodium and bicarbonate ions will stay in solution.2H2O –electricity–> 2H2 + O2Hydrogen gas is produced at the cathode.2H2O + 2e- –> H2 + 2OH-At the cathode hydroxide ions are also being produced which will react with bicarbonate ionOH- + HCO3- –> HOH + CO3=At the anode, oxygen gas is produced, along with hydrogen ions.2H2O –> O2 + 4H+ + 4e-Hydrogen ions may react with HCO3- to produce a small amount of H2CO3.H+ + HCO3- <==> H2CO3There is some doubt as to whether H2CO3 even exists. It is more likely this reaction:H+ + HCO3- <==> CO2(aq) + H2O(l)
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- Q: There are three forms of carbon atoms, Carbon-12, Carbon-13, and carbon-14, called isotopes. The only difference between these three forms is they have different numbers of ____________. daughter elements electrodes neutrons radioactive elements We have a radioactive isotope called RI which has a half-life of 10 million years. A geologist has used radiometric dating and determined the rock to be approximately 40 million years old. How many half lives have taken place? 1 2 3 4 Choose the statement that best explains how fossils help to show the story of the past. It is difficult to use fossils to tell the age of rocks, since radiometric dating is the only way to do this. Geologists and paleontologists rely solely on what they find in rocks to confirm their theories. Only once the fossils are freed from the rock, they can be studied and interpreted. The great bulk of the fossil record is dominated by fossils of animals with shells and microscopic remains of plants and animals
- A: I guess doing some reading would be too hard.Isotopes are different types of atoms of the same chemical element, each having a different number of neutrons.No idea what you mean by “how many half lives” – it doesn’t work that way.In 40 million years, the isotope has decreased by 16 times (10 million years leaves 1/2, the next 10 million years leaves 1/4, the next 10 million years leaves 1/8, the last 10 million years leaves 1/16 the original).Fossils are the remains of the hard parts of plants and animals, or the impressions made in mud by the plants or animals. Animals with no shells or other hard parts would leave little in the way of fossils.