click below
click below
Normal Size Small Size show me how
Ionic Bonding
IGCSE Edexcel (9-1) Chemistry
Question | Answer |
---|---|
What is Ionic Bonding? | Ionic Bonding is the strong electrostatic forces between oppositely charged ions. |
What is an Ion? | An ion is a charged particle formed when an atom gains or looses electrons. |
What are cations? | Postitive ions |
What are Anions? | Negative Ions |
Name all the ions which don't noble gas structure? | Fe2+, Fe3+, Au+,Cu+,Cu2+,Pb+,Nh4+,OH-,NO3-,CO32-. SO42- |
How much electrons are there in the outer shell of an element in group 2 | 2 Electrons |
Give the formulae for Calcium Chloride | CaCl2 |
What is the valency of Nitrate ion? | 1- |
What is the valency of Carbonate Ion? | 2- |
What is the valency of Sulphate Ion? | 2- |
What is the formulae and valency of Hydrogen Carbonate | HCO3+ |
Give the formulae for Sodium Bicarbonate | NaHCO3 |
Not ALL ionic compounds Form Crystals True or False | False |
What is a Lattice? | A Lattice is a regular array of Particles |
Describe the Structure of a Sodium Chloride Ion | Sodium Chloride has a giant ionic structure with every Na+ attracted to a Cl- . The bonding in a Giant ionic lattice extends in all directions. |
In magnesium Oxide ..... The attraction is between (What ions) | Mg2+ and O2- |
Describe the structure MgO and it's difference betweeen NaCl | MgO has a Giant ionic lattice with every Mg2+ attracted to O2-. The bonding in MgO extends in all directions. The only difference between MgO and NaCl is that MgO has stronger electrostatic forces as Mg and O have 2+ and 2- Charges. |
Give all The properties of Ionic compounds | -Have high melting and boiling points -Tend to be crystaliine - They are brittle - They are soluble in water - They are insoluble in organic solvents - They do not conduct electricity in solid state but they do conduct electrcity when molten |
Why do Ionic compounds have a high melting point? | Ionic compounds have a high melting point because of the strong electrostatic forces of attraction between opppositely charged ions in the giant lattice structure so Large amounts of thermal energy is required to break these forces |
Why are Ionic compounds Crystaline?? | Because of the regular arrangement of Ions in the lattice. |
Why are Ionic crystals Brittle? | Because Any small distortion of the ionic cystal will bring ions with the same charge alongside each other and as like charges repel ... The crystal will break apart |
Why are ionic compounds soluble in water?? | Water is a covalent molecule but electrons in the bonds are atrracted to oxygen. This makes oxygen slightly negative and hydrogen slightly positive, which means strong forces can be formed between water molecules and ions which provide enough energy ..... |
Why don't ionic compounds conduct electricity in solid form?? | Because the ions are fixed in position and are NOT free to move around REJECT: Particles or electirons insted of ions |
Why Can Ionic compounds conduct electricity when molten? | Because the ions are free to move around |