Chemical Calculations Notes (Week 1)

Chemical Bonding, structure and Quantity Aim To examine a range of mellow out which include metallic, covalent molecular, covalent giant and ionic giant Materials give and list of apparatus Google Bunsen burner semipolitical campaign provide Power supply Spatula pair of tongs Mats Method To weaken the characteristic physical properties of the inwardnesss six tests were done. These were tests of appearance, melting point, conduction of substantiality state, solubility in water, conduction of resolve and hardness. try 1: Appearance. This was to throwaway whether the nucleus was shiny, dull, with colour etc. screen out 2: warming point. Pieces of the solid state were primed(p) in a test tube and heat up, rough in tongs. These were heated slowly to start of with therefore more strongly. The substances were detect until they started to melt. It was been note whether the substance melts at highschool or low temperature. Test 3: conduction of solid. Electrodes of the conduction band were placed on a fragment of the solid it was observed whether there was a current flow or not. Test 4: solvability in water. A lower-ranking sum up of solid was placed in a test tube. weewee was added and the premix was stirred. This was to note whether a put one across declaration make or not. Test 5: conductivity of solution.

Where a solution was make in test 4, electrodes of the conductivity circuit were placed in the solution, to test if there was a current flow. Test 6: Hardness. An attempt to crush the substance was done victimisation a spatula. The observations were classified into waxy, soft, brittle, hard etc. all told observations were noted in the results table. Results dining table 1 Name of substanceAppearance Melting pointConductivity of solidSolubility in waterConductivity of solutionHardness SiliconShiny & SilverExtreme highSemi music directorinsolubleN/AVery hard CopperRust brownHigh Melting pointExtreme conductinsolubleN/Amalleable paraffin oil waxwhitelowDont conduct insolateinsolubleN/Asoftie &...

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