Ch 12.3 Flashcards
1
Q
What is the formula for lattice energy?
A
LE=K (Q1•Q2)/R
K is a constant
Q is the charge of cation and anion
R is the inter ionic distance
2
Q
As the charge goes up what happens to lattice energy
A
Lattice energy increases
3
Q
As R increases
A
Lattice energy decreases
And the inverse is the same
4
Q
In what order do we look at problems for lattice energy
A
- Charge up LE down
- Ionic radius down LE up
5
Q
What is lattice energy
A
Lattice energy happens when ions in the gas phase combine to form a solid.
6
Q
Ionic radius R increases to
A
The left and bottom of the periodic table
