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Reactivity & Uses
reactivity series and uses
| Term | Definition |
|---|---|
| Thermite process | Alum. + Iron, repair railway lines, molten iron in vigorous reaction, filling gaps and cracks in rail then hardens & Chromium from core, ore converted to chromium oxide, aluminum reduces the oxide and we obtain chromium |
| Sacrificial protection of iron | prevent rusting, zinc more reactive, more ready to form positive ions, zinc forms the oxides instead of the iron |
| Galvanisation | iron/steel plated with zinc by electrolysis & if broken off, there is still sacrificial protection |
| Making cells | more reactive metal has electrons flow from it to the less reactive metal |
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azra3.142