Ionic Compounds Flashcards
What structure do ionic compounds always have?
Giant Ionic Lattice
Define Giant Ionic Lattice
Regular structures, held together by ionic bonds (strong electrostatic forces of attraction between oppositely charged ions) acting in all directions
Energy is required to break these ionic bonds when the substance melts or boils.
Why do ionic compounds have high melting and boiling points?
Because of the strong attraction between ions requiring a large amount of energy to overcome
Describe the conductivity of electricity in ionic compounds
Ionic compounds don’t conduct electricity because the ions are fixed in place and can’t move
However, when an ionic compound melts, they are free to move and can then carry an electric charge
Do ionic compounds dissolve in water?
Yes, most ionic compounds dissolve in water - unlike covalent compounds
(hence ionic SOLUTIONS in electrolysis)
Name 3 properties of ionic compounds
High melting and boiling points
Solid ionic compounds don’t conduct electricity
Many dissolve easily in water
Give advantages and disadvantages of 2D representations of substances
Simple to draw and understand - accessible
Show the atoms contained and how they are connected
Don’t show a substance’s 3D shape
Don’t appropriately illustrate (relative) sizes of the atoms and their bonds
Give advantages and disadvantages of dot and cross diagrams of substances
Clearly illustrates the distribution and origin of electrons in covalent bonds
Don’t indicate relative atomic size or illustrate 3D arrangements of atoms or electron shells
Give advantages and disadvantages of 3D models of ionic solids
(Giant Ionic Lattices are the structure of ionic solids)
Show repeating ion arrangement in Giant Ionic Lattices
Can show relative ion size
Show ionic bonds
Don’t show all layers - only illustrate a compound’s outer layer
Difficult and time-consuming to draw
Give an example of 3D models to show substances
Ball and stick models
