Ionic bonding Flashcards
Explain why sodium chloride solution can carry a charge
[3 marks]
The Na+ ions and Cl+ions in the sodium chloride solution
Can move freely
and carry a charge
Explain how the corrosion of the surface of a metal like iron will affect its conductivity
[3 marks]
The conductivity is decreased
As an ionic compound is produced
Which will not conduct electricity when solid
Explain why ionic compounds are usually solid at room temperature
[2 marks]
There are strong electrostatic forces of attraction between the oppositeley charged ions
Which require a lot of energy to overcome
Explain why ionic liquids are used in batteries but solid ionic compounds are not
[3 marks]
In ionic liquids the ions are able to move freely
and carry a charge
In solid ionic compounds, the ions are unable to move freely
Explain why iodine cannot conduct electricity
[3 marks]
Iodine does not have delocalised electrons
Iodine has no ions
So it cannot carry a charge
Give three properties of ionic compounds
[3 marks]
Conducts electricity when molten
High melting point
Doesn’t coduct electricity when solid
Suggest some limitations of various diagrams of particles
They are 2-dimensional
They show the particles are spheres
They are not to scale
They don’t show the forces between particles
Explain how the sodium atom turns into an ion
[3 marks]
The sodium atom loses ONE electron
To become an ion have a charge of 1+
Explain why the hloride ion is negatively charged
[2 marks]
It as one more electron than protons
Explain why the chloride ions and sodium ions in sodium chloride are strongly attracted to eachother
[1 mark]
Oppositely charged ions are attracted to eachother
Explain why ions in a lattice structure stay in place
[3 marks]
The metal ion has a positive charge and the non-metal ion has a negative charge
The oppositely charged ions are attracted to eachother
And the ions are arranged alternatively
