Classification Of Substances

SACE Stage 1 Chemistry – Experiment – Classification of vegetable marrows objective lens: To examine the physical properties of a digit of stubs and to classify them into groups rule: 1. interrogatory for conductivity in its clean state by having two electrodes in the substance that do not achieve and chatter whether the light bulb turns on. 2. Testing to see the issuing of heat on the substance, the heat was supplied with the etna burner. We heated each substance for two minutes to see if a transfer occurred. 3. Then we checked if its state was traded and trialed whether it conducted galvanic energy in its changed form. This was done in the same counsel as testing its pure state. 4. Then we tested the substance to see if is fade out in irrigate. Simply having whatsoever of the substance into a test tube and adding water and divulge what happens next. 5. If it did dissolve we tested whether it conducte d electricity when in a stem with water. 6. Then finally, we tested if it was disintegrable in dichloromethane. Results: Name | design and State |Cond. Of pure substance |Effect of Heat | melt down point |Cond. Of molten substance | solubility in water |Cond.

Of substance in water |solvability in CH2Cl2 | |Iodine |I2 unharmed |NO |YES sublimation |113°C |NO |YES |NO |YES | |Naphthalene |C10H8 secure |NO |YES semiliquid |80.26°C |NO |NO |N/A |YES | |Ethanol |C2H5OH Liquid |NO |YES Vaporises |N/A |NO |Already liquid |N/A |Doesn’t change integrity | |Wax |CXHY unshakable |NO | YES Liquid |45°C |NO |NO |N/A |NO | | g! ritstone |SiO2 Solid |NO |NO CHANGE |1713°C |N/A |NO |N/A |NO | | cat valium nitrate |KNO3 Solid |NO |YES Liquid |338°C |YES |YES |YES |NO | |Zinc oxide |ZNO2 Solid |NO |NO / colour change |1975°C |N/A |YES |NO |NO | | southward |S Solid |NO |YES Liquid |113°C |NO |NO |N/A |NO | |Sodium chloride |NaCl Solid |NO |YES Liquid |801°C |YES |YES |YES |NO | |Sugar |C12H22O11 Solid |NO |YES Liquid |146°C |NO |YES |NO |NO | |N.B.:...If you want to get a safe essay, order it on our website: OrderCustomPaper.com

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