are neutral because the total positive charges of the cation equal the total negative charge of the...
TRANSCRIPT
Ionic Compounds• Are neutral because the total positive charges of
the cation equal the total negative charge of the anion.
Ionic Compounds• Are neutral because the total positive charges of
the cation equal the total negative charge of the anion.
• Cation is written and named first, anion is second.
Ionic Compounds• Are neutral because the total positive charges of
the cation equal the total negative charge of the anion.
• Cation is written and named first, anion is second.• Because the charges of each are ‘cancelled’ out –
the charges are not written.
Ionic Compounds• Are neutral because the total positive charges of
the cation equal the total negative charge of the anion.
• Cation is written and named first, anion is second.• Because the charges of each are ‘cancelled’ out –
the charges are not written. • EG. Lead Chloride = Pb2+ and Cl-.
Ionic Compounds• Are neutral because the total positive charges of
the cation equal the total negative charge of the anion.
• Cation is written and named first, anion is second.• Because the charges of each are ‘cancelled’ out –
the charges are not written. • EG. Lead Chloride = Pb2+ and Cl-
• Therefore lead chloride contains 2 chloride ions for every lead ion – Pb2+ Cl- Cl- = PbCl2
Writing formulae for ionic compounds• EG. Sodium Carbonate.• _______ + _________• From the charges on each side how many do we
need to make it balanced?
Writing formulae for ionic compounds• EG. Sodium Carbonate.• From the charges on each side how many do we
need to make it balanced?• Na+ Na+ and CO3
2-
Writing formulae for ionic compounds• EG. Sodium Carbonate.• From the charges on each side how many do we
need to make it balanced?• Na+ Na+ and CO3
2-
• Formula has cation first and anion second =
Writing formulae for ionic compounds• EG. Sodium Carbonate.• From the charges on each side how many do we
need to make it balanced?• Na+ Na+ and CO3
2-
• Formula has cation first and anion second = Na2CO3
Aluminium Sulfate
• Al3+ and SO42-
• We need to make it neutral, so…• Al3+ Al3+ and SO4
2- SO42- SO4
2-
Aluminium Sulfate
• Al3+ and SO42-
• We need to make it neutral, so…• Al3+ Al3+ and SO4
2- SO42- SO4
2-
• Formula is therefore Al2(SO4) 3
Lead Nitrate
• Contains Pb2+ and NO3-
• We need to make it neutral = two nitrate ions for every lead ion
Lead Nitrate
• Contains Pb2+ and NO3-
• We need to make it neutral = two nitrate ions for every lead ion
• Pb(NO3) 2
Complete
Name of compound
Ions present Balance Formula
Sodium Chloride
Iron(III) Chloride
Aluminium Oxide