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Results: Table 1: Analysis of pH using Universal Indicator Solution Description pH according to table HCl Clear Red 3 NaOH Purple +11 HNO3 Clear red 3 CH3COOH Red 3 NH4OH Purple +11 NaCl Lime green 7 Suspect 1 Lime green 7 Suspect 2 Green 7 Suspect 3 Clear Red 3 Suspect 4 Clear Red 3 Table 2: Measurement of pH in solutions using a pH meter. Solutions pH reading HCl 1.8 NaOH 11.94 HNO3 1.7 CH3COOH 2.74 NH4OH 10.18 NaCl 4.3 Suspect 1 4.27 Suspect 2 4.5 Suspect 3 1.84 Suspect 4 1.7 Table 3: Test for the presence of HCl or HNO3 on solutions using 0.1M of silver nitrate. Solution Positive (white) or Negative Change (clear) HCl Positive HNO3 Negative Suspect 1 Positive Suspect 2 Positive Suspect 3 Negative Suspect 4 Negative Table 4: Measurement of separation of solution using Thin Layer Chromatography. Solution Distance from origin to solvent front (mm) Distance from origin to component spot (mm) RF Aspirin 51 36 0.706 Caffeine 51 11 0.216 Paracetamol 51 23 0.451 Suspect 1 44 11 0.25 Suspect 2 44 27 0.61 Suspect 3 44 11 0.25 Suspect 4 44 8 0.18 Table 5: Analysis of suspect substances compared against Sand, NaCl, and Strontium Nitrate using a microscope Substance Deduced compound Suspect 1 NaCl/ Strontium Nitrate Suspect 2 Sand Suspect 3 NaCl/ Strontium Nitrate Suspect 4 NaCl/ Strontium Nitrate Table 6: Analysis of metal fragments using a magnet Substance Observations Iron Attraction, black, thin Aluminium No attraction, grey particles Brass No attraction, copper strands Suspect 1 Attraction, black, spikes Suspect 2 No attraction, grey particles Suspect 3 Attraction, some black.
Approximate Word count = 685
Approximate Pages = 2.7
(250 words per page double spaced)
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