Reactivity of Groups
- Created by: Alice Clews-Smith
- Created on: 09-06-16 10:14
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- Group 2
- Hydroxide solubility increases down the group.
- Sulphate solubility decreases down the group.
- React with water to produce hydroxides.
- Burn with oxygen to produce flame colours.
- Lithium is lipstick red
- Sodium is sunny yellow.
- Calcium helps bones grow stronger to build a brick red house.
- Potassium is lilac like the purple potted flowers.
- Rubidium is red
- Barium is bowlers green.
- Casium is bodybuilder blue.
- React with chlorine to form white solid chlorides.
- Group 1 & Group 2
- Group 2 and less thermally stable than group 1.
- Nitrates decompose to form oxygen.
- Carbonates decompose to form carbon dioxide.
- Carbonates thermal stability increases down Group 2.
- Nitrates thermal stability increases down Group 2.
- Halogens
- Highly reactive - decreases down the group.
- Electronegativity decreases down the group.
- The ability of an atom to withdraw or attracts an electron pair in a covalent bond.
- Low solubility in water as they are covalent and diatomic.
- Halogen are oxidising agents.
- Melting and boiling points decrease down the group.
- Undergo disproportionation with alkalis.
- Halide
- Negative ion state of Halogens.
- Act as a reducing agent.
- Reducing ability increases down the group - an electron is lost easier.
- React with sulphuric acid to give a hydrogen halide.
- Halide + Silver Nitrate
- F- = No precipitate.
- Cl- = White precipitate.
- Br- = Cream precipitate.
- I- = Yellow Precipitate.
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