C3.4 - Giant Ionic Structures (Finished) Flashcards
Why do giant ionic structures have high melting points and boiling points?
Because they have many strong ionic bonds between the ions. It takes a lot of energy to overcome the attractions
Why does a solid ionic compound not conduct electricity?
The ions are all held in place, so they can’t move around (travel) to conduct electricity.
Ionic compounds have a structure called a giant ionic _____. The ions form a _____ packed regular _______ arrangement. There are very strong ____________ forces of attraction between ______ charged ions
Lattice, closely, lattice, electrostatic, oppositely
In what way do the electrostatic forces of attraction act in lattices?
In all directions
Draw the lattice structure of sodium chloride
🔴= Chlorine 🔵= Sodium 🔴🔵🔴🔵🔴 🔵🔴🔵🔴🔵 🔴🔵🔴🔵🔴 🔵🔴🔵🔴🔵 🔴🔵🔴🔵🔴 Layer 1,3,5,7,etc
🔵🔴🔵🔴🔵 🔴🔵🔴🔵🔴 🔵🔴🔵🔴🔵 🔴🔵🔴🔵🔴 🔵🔴🔵🔴🔵 Layer 2,4,6,8,etc
Why can an ionic compound conduct electricity when in water?
The water molecules will separate the lattice of ions to make them free to move around with the solution formed carrying an electric charge
Why can an ionic compound conduct electricity when melted?
High temperature provides enough energy to overcome the strong bonds between the ions, so they become free to move around the moulten compound and transfer an electric current
Will a negative ion move to a negative or positive electrode?
Positive
In what direction do the electrostatic forces of attraction in ionic structures act?
In all directions
What are the similar properties between ionic compounds?
- All have high melting and boiling points
- Can’t conduct electricity when solid
