Chemical Calculations Notes (Week 1)

Chemical Bonding, structure and Quantity Aim To investigating a range of meld which include metallic, covalent molecular, covalent freak and ionic giant Materials employ and list of apparatus Google etna burner political campaign tube Power supply Spatula pair of tongs Mats Method To weaken the characteristic physical properties of the significations six probes were done. These were tests of appearance, run point, conductivity of solid state, solubility in water, conductivity of melt and heavy(a)ness. testify 1: Appearance. This was to throwaway whether the substance was shiny, dull, with colour etc. trial 2: warming point. Pieces of the solid were primed(p) in a test tube and heated, rough in tongs. These were heated late to start of with then more strongly. The substances were detect until they started to melt. It was been demarcationd whether the substance melts at high or low temperature. Test 3: conduction of solid. Electrodes of th e conductivity band were dictated on a fragment of the solid it was observed whether there was a online flow or not. Test 4: Solubility in water. A small sum up of solid was placed in a test tube. weewee was added and the mixture was stirred. This was to note whether a clear declaration make or not. Test 5: Conductivity of solution.

Where a solution was formed 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 onset to crush the substance was done victimisation a spatula. The observations were classify into waxy, soft, brittle, hard etc. All o bservations were noted in the results table.! Results delay 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 waxwhitelowDont conduct insolateinsolubleN/Asoftie &...

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