2806747
Description
Flashcards by Anna Hargreaves, updated more than 1 year ago
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Created by Anna Hargreaves
over 9 years ago
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| Question | Answer |
| ionic lattice- mp/bp -hardness -conductivity -solubility h20 -solubility solvent | high mp bp hard but brittle conduct when aqueous/molten soluble in water not soluble in solvent |
| covalent network - mp/bp -hardness -conductivity -solubility h20 -solubility solvent | very high mp very hard if 3d doesn't conduct except graphite insoluble insoluble |
| metallic lattice - mp/bp -hardness -conductivity -solubility h20 -solubility solvent | high except mercury hard but malleable conducts insoluble insoluble |
| covalent molecular - mp/bp -hardness -conductivity -solubility h20 -solubility solvent | low soft doesn't insoluble soluble |
| macromolecular covalent (polymer) - mp/bp -hardness -conductivity -solubility h20 -solubility solvent | moderate often decompose on heating variable doesn't insoluble sometimes soluble |
| write equilibrium reaction Kc= for N2+3H2-->2NH3 | [NH3]^2 Kc=-------------------- [N2][H2]^3 |
| Kc is a measure of It is affected by | How far a reaction proceeds. Mainly products then large temperature only |
| conditions haber process | iron catalyst 450C 200atm incr temp ^rate <yield incr pressure ^rate+yield caro |
| there are for nitrogenous gasses. how are they formed? what colour are they? | N2- denitrifying bacteria- colourless N20- denitrifying bacteria- colourless NO - denitrifying, thunder, car engines, colourless NO2- oxidation of NO in atm, BROWN |
| there are three aqueous forms of nitrogen. what are they how are they formed | NH4- = n fixing rood nodules NO2- = nitrifying bacteria NO3- = nitrifying bacteria |
| NO2- bonding | 1 double bond 1 single bond single boded 0 has extra e |
| no3- bonding | 1 dative covalent bond nitro gives 1 double bond 1 single bond 0 has extra |
| n2 is unreactive because | high activation enthalpy needed to break tripple bond |
| lma | laser microspectral analysis used to analyse pigment samples |
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