Halogen Family Flashcards
(8 cards)
G17
Atomic radius
MP
BP
Density
IE
EN
EGE
Oxidizing power
BDE
Down the group
Atomic radius - increases
MP - increases
BP - increases
Density - increases
IE - decreases
EN - decreases
EGE - decreases
Exception: Cl>F>Br>I
Oxidizing power - increases
BDE - decreases
Exception: Cl2>Br2>F2>I2
G17 hydrides
Acidic strength
Reducing power
Bond length
Bond dissociation energy
Thermal stability
BP
MP
Acidic strength - increases
Reducing power - increases
Bond length - increases
Bond dissociation energy - decreases
Thermal stability - decreases
BP - increases
Exception : HCl<HBr<HI<HF
HF is highest due to Hydrogen Bonding.
MP - increases
Exception : HCl<HBr<HF<HI
Oxides with F
Thermally stable oxide of F
Oxidizing nature of oxides of Cl
Bleaching agent of Cl
Br oxides stability, existing temp and OA or RA
I oxide in CO estimation
OF2 and O2F2
OF2
Highly reactive oxidizing agents and tends to explode.
ClO2
Least stable, low, Strong OA
I2O5
Inter halogen
Formula
Covalent or ionic
Volatile/ non volatile
Why is the interhalogen compound not as strong as X2
XX’ where X’ is small
Covalent
Volatile
Because the X-X’ Bond is weaker than X-X bond
Chlorine - Deacon’s process
Reaction
Catalyst
Temp
4HCl + O2 –CuCl2–> 2Cl + 2 H2O
CuCl2
723K
Chlorine
Colour
Odour
Weight wrt air
Solubility in h2O
Bleaching powder (OA or RA?)
Chlorine water loses its yellow color on standing. Why?
What does HOCl give to attain bleaching property?
Greenish yellow
Pungent and suffocating
2-5 times more
Soluble
Ca(OCl2) - OA
Due to the formation of HCl and HOCl
Nascent O
Reactions with Cl
Excess NH3 + Cl2
NH3 + Excess Cl2
Cold and dil NaOH + Cl2
Hot and conc NaOH + Cl2
NH4Cl + N2
NCl3 + 3 HCl
NaCl+NaOCl+H2O
NaCl+NaClO3+H2O
HCl
Colour, smell, solubility in water
Aqua regia
Colourless, pungent, highly soluble
HNO3:HCl = 1:3 - dissolves gold and platinum to give AuCl4- and PtCl6²- with NO and H2O
