CHEMISTRY 1A
- Created by: Shine.7
- Created on: 12-04-14 23:41
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- CHEMISTRY 1A
- ELECTROLYSIS- splitting up with electricity
- Expensive/high temp/a lot of stages/lot of energy
- Copper metal is purified so it can conduct electricity.
- DISPLACEMENT reaction- reactive metal will replace less reactive one.
- REMEMBER: reactivity series!
- ALLOYS
- Impurity taken away at BF, SO regular arrangement of atoms-slide over/ iron is soft and easily shaped.
- Pure iron= too bendy. Iron from BF= brittle+ 4% carbon (impurity)
- harder than pure metals- different sized atoms-layer is mixed=diffcult to slide over.
- Reduction with Carbon
- Oxygen is removed.
- Anything below Carbon (reactivity series) is extracted,carbon can only take oxygen away from metals,less reactive than itself
- LIMESTONE CaCO3
- 2) CaO+ H2O= CA(OH)2 [it's an alkali which is used to neautralise acidic soil.]
- Used to test for CO2 /if found turns Cloudy.
- 1)Thermal Decomposition: CaCo3 heated= CaO + CO2
- 3) Limestone+ Acid= SALT+H20+CO2
- 3 Building materials made: Cement/Mortar/Concrete
- 2) CaO+ H2O= CA(OH)2 [it's an alkali which is used to neautralise acidic soil.]
- [Bioleaching] use of bacteria to seperate copper from copper sulfate.
- [Phytomining] Growing plants-Soil-Contain Copper./Copper builds up-plant dried and burnt/C collected from ash.
- DIS: more stages=more energy involved. // slow process
- ADV: carbon neutral
- DIS: more stages=more energy involved. // slow process
- ADV: copper from low grade ore.
- DIS: very slow
- [Phytomining] Growing plants-Soil-Contain Copper./Copper builds up-plant dried and burnt/C collected from ash.
- Fractional Distillation/ Fractionating Column
- Crude oil split into seperate groups of hydrocabron
- LOW BP /MP& short lenght molecule AT THE TOP (Gas)
- HIGH BP/MP+long molecule AT THE BOTTOM(solid)
- LOW BP /MP& short lenght molecule AT THE TOP (Gas)
- Crude oil split into seperate groups of hydrocabron
- COMBUSTION
- ]Complete] all fuels burn since plenty of oxygen
- [Incomplete/Partial] fuels nomt burn- lack of oxygen-Particulates of soot produced.
- SMELTING
- ADV: faster//more copper produced
- DIS: still need electrolysis//greenhouse gases produced
- ADV: faster//more copper produced
- METALS: strong/bendy/conductors
- I.e Copper and it doesnt react w/ water
- i.e Aluminium and Titanium=corrosion resistant&low density
- titanium is stronger.
- Titanium-hip replacements
- Aluminium=areoplanes
- CAN CORRODE!(w/ air/water) /lose strenght&hardness. Protection needed: oil/paint
- ELECTROLYSIS- splitting up with electricity
- ALKANES
- S/SH/SB
- less heatlhy-increase Cholestrol/block arteries/heart disease
- Nothing happens in in bromine water
- CnH2n+2 (many hydrogen atoms as possible)
- IONIC BONDING {metal+non-m} metal loses electron [+ion] non-m gains it [-ion}
- COVALENT BONDING {Non-m ONLY} [2 atoms share an electron}
- COMPOUNDS- diff. properties from their original elements
- RECYCLING: saves money/conserves resources/less polution-not going to landfills
- Mining ores
- Useful prdt made/jobs/money in the area/
- noise/loss habitat/ruin land/dangerous
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