A level chemistry group 2
- Created by: _georgia.wilson_
- Created on: 23-06-20 20:00
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- Group 2
- Reactions
- Extraction of titanium: 1:Titanium ore converted to TiCl4 (heating with C in a stream of Cl2(g) )
- 2: TiCl4 is purified by fractional distillation before being reduced by Mg in a furnace
- TiCl4(g) + 2Mg(l) => Ti(s) + 2MgCl2(l)
- 2: TiCl4 is purified by fractional distillation before being reduced by Mg in a furnace
- Solubility(down the group): x1 charged ions (OH-) increase, 2x charged ions (SO4*2-) decrease
- BaSO4 is insoluble
- Test for sulfate: Add dilute HCl, barium chloride, white precipitate
- Barium meal: BaSO4 being insoluble is used in x-rays (suspension rather than a solution => poisonous)
- OH- neutralising acids: Ca(OH)2- agriculture, soils Mg(OH)2- antacid
- BaSO4 is insoluble
- Removal of sulfur dioxide from flue gases: Wet Scrubbing (acidic SO2 reacting with an alkali). CaO / CaCO3 with water
- CaO(S) + 2H2O(l) + SO2(g) => CaSO3(s) + 2H2O(l)
- if CO3 used => CO2 produced aswell
- CaO(S) + 2H2O(l) + SO2(g) => CaSO3(s) + 2H2O(l)
- Reaction with water: metal oxidise to form 2+ ions. React with H2O to give a metal hydroxide and hydrogen
- Ca(s) + 2H2o(l) => Ca(OH)2(aq) + H2
- Extraction of titanium: 1:Titanium ore converted to TiCl4 (heating with C in a stream of Cl2(g) )
- Properties (as you go down the group)
- 1st ionisation energy: decreases due to shielding and distance from nucleus increasing
- Melting Point: Decreases due to ion getting bigger (charge and e- remains the same)
- reactivity: increases as it's easier to lose electrons
- Atomic radius: increases because of the increase in electron shells
- Reactions
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