Giant Ionic Structures Flashcards
why do ionic compounds have high melting/boiling points?
strong electrostatic forces hold the ions together therefore more energy (so more heat) is required to overcome them
why can ionic compounds conduct electricity when dissolved or molten but not when solid?
because particles are held in place and can’t move so the electricity can’t flow through due to no delocalised electrons but when molten or in a solution the ions can move freely (when they are delocalised) therefore the electricity can flow through them.
can an ionic compound conduct electricty when molten or dissolved?
yes
when and how can ionic compounds conduct electricity?
when molten/dissolved because there are delocalised electrons so the electricity can flow through because they separate into charged ions which are then attracted to the oppositely charged electrodes.
what are the properties of ionically bonded compounds?
They form crystals.
They have high melting points and high boiling points.
They’re hard and brittle
They conduct electricity when they are dissolved in water.
They’re good insulators.
what is an ionic lattice?
they have a regular, repeating arrangement called an ionic lattice . The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.
what is the movement of ions like in molten or dissolved ionic compounds?
free to move wherever they want to go
