Group 2 Flashcards
Atomic radius down group 2?
Increases
Additional electron shells
Reactivity down group 2?
Increases
increased e- shielding down group
e- easier to lose
IE down group 2?
decreases
greater atomic radius
increased amounts of shielding
Melting point down group 2?
decrease
metallic lattice
larger ions going down
weaker atttractive forces as they act over a greater distance
group 2 and water reaction produces?
metal hydroxide and water in a redox reaction
magnesium and steam reaction?
produces hydrogen and MgO
faster than water due to increased energy
burns with bright white flame
and produces white powder
solubility of group 2 hydroxides down the group?
increases
uses of Mg(OH)2
antacid to neutralise excess stomach acid because it’s alkaline
Ca(OH)2 uses
neutralise acidic soil as it’s alkaline
solubility of group 2 sulfates down the group?
decreases
explain barium sulfate’s most useful property
insoluble
used in barium meal as medical tracer
cannot be absorbed into blood
allows for imaging of internal organs
barium chloride use
test for sulphates - white precipitate of BaSO4
Barium sulfate ionic equation
Ba 2+ + SO4 2- -> BaSO4
Titanium extraction equation and reaction type
Displacement
TiCl4 + 2Mg -> 2MgCl2 + Ti
Flue gas removal purpose and both equations
Remove SO2 before it enters the atmosphere
CaO + 2H2O + SO2 -> CaSO3 + 2H2O
CaCO3 + 2H2O + SO2 -> CaSO3 + 2H2O + CO2
CaSO3 is calcium sulfite
