Module 2 Summary

Question 1

SbCl3 molecules are polar

Explain why

Answer 1

There is a difference in electronegativity between Sb and Cl
The molecule is not symmetrical

Question 2

Cerium reacts with sulphuric acid. How has a salt been formed

Answer 2

Hydrogen ion has been replaced by a metal ion

Question 3

How many electrons in each shell

Answer 3

1 - 2
2 - 8
3 - 18
4 - 32

Question 4

Describe what is meant by the term ionic lattice, in terms of the type and arrangement of particles present

Answer 4

Repeating patterns of oppositely charged ions

Question 5

State whether the follow substances conduct electricity when solid or motion and explain your answers in terms of the particles involved

1. Aluminium
2. Aluminium Fluoride
3. Aluminium tribromide

Answer 5

Aluminium conducts electricity in solid and molten state. As it has a delocalised electron
Aluminium Fluoride conducts in molten state as ions are free to move. It does not conduct in solid as the ions are in fixed poisition in an ionic lattice
Aluminium tribromide does not conduct electricity in solid or molten because no ions are free to move.

Question 6

Outline a simple practical test that would confirm the presence of chloride ions and give the expected results

Answer 6

Add a few drops of silver nitrate

White precipitate should form

Question 7

What apparatus is used to separate the two liquid layers

Answer 7

Separating funnel