Chap 4: Ionic Bonding

Question 1

What is the crystal lattice?

Answer 1

When many cations and anions are bound together by an electrostatic force, forming a three-dimensional structure.

The greater the electrostatic force, the more stable the lattice

Question 2

What is ionic compound?

Answer 2

The electrostatic attraction between oppositely charge ions

Question 3

What are the properties of ionic compounds?

Answer 3

Hardness, Brittleness, High Melting Point, Conductivity

Question 4

Why are Ionic compounds hard and brittle?

Answer 4

Ionic bonds have a strong electrostatic bond between cations and anions are strong so there is a large amount of force needed to disrupt these bongs

Ionic bonds are brittle when there is a significant impact on the structure, the ions with the same charge become closer together and have a strong repulsive force against each other

Question 5

Are ionic compounds conductive?

Answer 5

In solid form, there is no movement between the particles as all the ions are locked together in the ionic bonding model.

However, in it’s molten or aqueous state the lattice is broken, allowing ions to move around freely

Question 6

How are ionic compounds formed?

Answer 6

electrons are transferred, as one electron is given to another. This forms an electrostatic attraction

Question 7

What is precipitation?

Answer 7

When two or more clear aqueous solutions react to form at least one solid product

Question 8

What is evidence a precipitate is formed?

Answer 8

There is a formation of sediment, and the test tube will become cloudy