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Elements of the sea What do we think about with the title elements of the sea? Remember were in chemistry.

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Presentation on theme: "Elements of the sea What do we think about with the title elements of the sea? Remember were in chemistry."— Presentation transcript:

1 Elements of the sea What do we think about with the title elements of the sea? Remember were in chemistry

2 Atoms and Ions Ions in solution Group 7 Manufacturing Dipoles Bonding Halogenoalkanes Elements of the sea Ionic Formulae

3 Content Process Benefit Ionic solids Concentrations in solution Precipitation reaction Demo an reaction Calculations Understand how particles interact

4 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?

5 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

6 Ionic Lattice Ions in solution

7 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) + NO 3 - (aq) + Na+ (aq) + Cl- (aq) AgCl (s) + Na+ (aq) + NO 3 - (aq) Ag+ (aq) + Cl- (aq) AgCl (s)

8 Precipitation reaction Rules for ionic precipitation (learn) All nitrates are soluble All chlorides; except AgCl and PbCl 2 Most sulfates are soluable except for BaSO 4, PbSO 4 and SrSO 4 All Na/K/NH 4 + salts are soluble All carbonates are insoluble (except NH gp 1 elements) Ions that are not involved in the reaction (spectator ion) Summarise into Ionic equation – state symbols important! Ionic precipitation

9 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 cm 3 =1dm 3

10 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 cm 3 =1dm 3

11 Try this – table vs table NaOH - which goes where? Make up your own card sort of a compound – with at least 3 concentrations/volumes/moles

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

13 Best Choice – Salters A level / ES Formula, equations, amount / Concentration Finish CI1.5 CI5.1 CS ES1


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