Ionic Compiunds Flashcards
What type of structure do ionic compounds have?
Giant ionic lattice structures
Ions form a closely packed regular lattice, with strong electrostatic forces of attraction between oppositely charged ions.
What is a single crystal of sodium chloride represented as?
One giant ionic lattice
The Na+ and Cl- ions are held together in a regular lattice.
What are the properties of ionic compounds with respect to melting and boiling points?
High melting and boiling points
Due to the strong attraction between the ions, a large amount of energy is required to overcome this attraction.
Do solid ionic compounds conduct electricity? Why or why not?
No, because ions are fixed in place
In solid form, ions cannot move, preventing electricity conduction.
What happens to ionic compounds when they melt?
Ions are free to move and carry an electric charge
This allows melted ionic compounds to conduct electricity.
How do ionic compounds behave when dissolved in water?
They dissolve easily and ions are free to move
This allows them to carry an electric charge in solution.
What are the advantages of 2D representations of molecules?
Simple and show atom connections
They do not show the shape of the substance or the sizes of atoms.
What is a limitation of dot and cross diagrams?
They don’t show size or arrangement of atoms
Useful for showing how compounds or molecules are formed and the origins of electrons in bonds.
What do 3D models of ionic solids show?
Arrangement of ions in the outer layer
They provide a visual representation but may not depict the entire structure accurately.
What is a ball and stick model used for?
To show how atoms in a substance are connected
They help visualize structures but can be misleading about the size of atoms.
Why might ball and stick models be considered misleading?
They suggest big gaps between atoms
In reality, electron clouds interact in these spaces.
What is a key property of calcium chloride as an ionic compound?
High melting point
This is due to the strong ionic bonds that require significant energy to break.
