Think you teacher meant that we must have the main points written for each
question. Not so much that your answers are vague.

My suggested answers (in main points format to help you):

Solid Sodium Chloride:
1) Na+ & Cl- ions are held together by strong electrostatic forces of attraction
2) In a Crystal Lattice Structure
3) Ions are in fixed position and unable to move around
4) Thus, it does not conduct electricity

Sodium Chloride in Water:
1) Na+ & Cl- ions are free to move in water
2) Thus, it conducts electricity

Seems like you only missed out 1 point -> “Crystal Lattice Structure”

Hope this helps
Sean

Is my explanation vague?My Chemistry teacher always say that.I have problems answering such questions…any tips in answering?=)Thanks in advance!

Gary