Question

According to Coulomb’s law, rank the interactions between charged particles from most negative to least negative lattice energy.

a. A 1+ charge and a 1- charge separated by 100 pm

b. A 2+ charge and a 1- charge separated by 100 pm

c. A 1+ charge and a 1+ charge separated by 100 pm

d. A 1+ charge and a 1- charge separated by 200 pm

Brief explanation:

Answer 1

The columb law says that Force = kq1q2/r^2

If the two charges are same, then the force will be repulsive and if the two charges are difference then the force will be attractive

For the a part we get K(1)(1)/(100pm)^2 (attractive force)

For the b part we get K(2)(1)/(100pm)^2 (attractive force)

For the c part we get K(1)(1)/(100pm)^2 [repulsive force]

For the d part we get K(1)(1)/(200pm)^2 [attractive force[

Hence the most negative will be the part b, followed by part a, part d then the least negative lattice energy will be part c

Correct Order: b < a < d < c