Originally posted by Dumbmoo:explain for the difference in melting point b/w this two compounds
Melting pointSodium bromide 747
Aluminium bromide 97.8
Since both of the compounds are ionic compound i was trying to explain it based on lattice energy but i realised that it doesnt make sense since aluminium bromide shld have a higher melting point (higher charge) based on LE explaination. Then i started thinking abt polarising power, and that aluminium bromide has got a greater covalent character due to higher charge density, but im not sure if it is even correct…if it is, im not sure how i can relate it to melting point.
Thx
This is actually a more complex matter than can be handled at 'A' levels.
At 'A' levels, give the simplified statement that :
Greater Ionic character = higher melting point.
Greater Simple Covalent character = lower melting point.
Giant Covalent lattice = highest melting point.