Elements of the sea

What do we think about with the title elements of the sea?

Remember we’re in chemistry

Atoms and Ions

Ions in solution

Group 7

Manufacturing

Dipoles

Bonding

Halogenoalkanes

Elements of the sea

Ionic Formulae

Content

Process

Benefit

• Ionic solids• Concentrations in solution• Precipitation reaction

• Demo an reaction• Calculations

• Understand how particles interact

What is an ion?• A charged particle

• If positive they are called ?• How do they become positive?• If negative they are called?• How do they become negative?• Draw an ionic structure (label it)• How are they held together?

What is an ion?• A charged particle

• If positive they are called ? Cation• How do they become positive? Lose an e-• If negative they are called? Anion• How do they become negative? Gain an e-• Draw an ionic structure (ionic lattice)• How are they held together?

Electrostatic forces

Ionic Lattice

Ions in solution

Precipitation reaction

• Creating a solid • Ions that are not involved in the reaction

(spectator ion) can be removed• Summarise into ......

• Ionic equation – state symbols important!• Ionic precipitation

Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq)

AgCl(s) + Na+(aq) + NO3-(aq)

Ag+(aq) + Cl-(aq)

AgCl(s)

Precipitation reaction• Rules for ionic precipitation (learn)

• All nitrates are soluble

• All chlorides; except AgCl and PbCl2

• Most sulfates are soluable except for BaSO4, PbSO4 and SrSO4

• All Na/K/NH4+ salts are soluble

• All carbonates are insoluble (except NH4+ + gp 1 elements)

• Ions that are not involved in the reaction (spectator ion)• Summarise into ......

• Ionic equation – state symbols important!• Ionic precipitation

Solution Concentration• Concentration = Conc. (gdm-3)

(moldm-3) molar mass ( gmol-1)

• No. of moles = Conc. (moldm-3) x Vol (dm-

3)

n

c v

n= moles (mol)c= conc. (moldm-3)V= vol (dm-3)

1000 cm3=1dm3

Chemical Ideas 1.5• Concentration = Conc. (gdm-3)

(moldm-3) molar mass ( gmol-1)

• No. of moles = Conc. (moldm-3) x Vol (dm-

3)

n

c v

n= moles (mol)c= conc. (moldm-3)V= vol (dm-3)

1000 cm3=1dm3

Try this – table vs tableNaOH - which goes

where?

Make up your own card sort of a compound – with at least 3 concentrations/volumes/moles

Exam question

Make up your own card sort of a compound – with at least 3 different concentrations/volumes + moles

Best Choice – Salters A level / ES Formula, equations, amount / Concentration

Finish CI1.5CI5.1

CS ES1