Essay on Senior Science- Open Ended Investigation

2551 Words Mar 21st, 2012 11 Pages
senior scienceSenior Science Assessment Task One
Written Task: Open Ended Investigation
Aim:
Compare the solubility of various forms of panadol at body temperature in different pH conditions
Hypothesis
Panadol 6 will dissolve faster than any other panadol and all type of panadol will have increase solubility in acidic conditions
Apparatus and Materials * 54 alcohol swabs * Glass thermometer * 600mL pyrex measuring jug (heat resistant, transparent, glass, volumetric measuring instrument) * 54 heat resistant, transparent, plastic cups * 18 Panadol 1 tablets “Panadol - Tablets” (Tablet with Potassium Sorbate Preservative) * 18 Panadol 2 tablets “Panadol – Caplets” (Capsule shaped Tablets with Hydroxybenzoate
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| 3 | 0 | 3 | 0 | 0 | 0 | 7 | 30sec | | Small bubbles form to surface | Almost crumbled | No change | No change | Small bubbles form to surface | Completely dissolved | | 1 | 1 | 5 | 0 | 0 | 7 | 10 | | 2 | 1 | 5 | 0 | 0 | 8 | 10 | | 3 | 0 | 5 | 0 | 0 | 7 | 10 | 1min | | Excessive bubbles on surface, particle crumble off in grains | Completely crumbled | Coating starts dripping off, colours solvents, slimy consistency, shape in tact | Capsule displaced and started opening | Bubbles rising & particles started breaking apart | No change | | 1 | 3 | 6 | 1 | 1 | 8 | 10 | | 2 | 2 | 6 | 1 | 1 | 8 | 10 | | 3 | 3 | 7 | 0 | 2 | 9 | 10 | 3min | | Particles and bubbles rise to surface of solvent | Crumbled, powder/sand consistency | Green panadol label disappeared, particles bubbled and string like bits of coating were in water | Fully opened, green coating rose to the top & then shot back down | Particles rising and falling, shooting up | No change | | 1 | 4 | 7 | 2 | 3 | 9 | 10 | | 2 | 4 | 7 | 1 | 3 | 9 | 10 | | 3 | 5 | 7 | 2 | 2 | 8 | 10 | 5min | | Particles continue to rise | Very small fine particles | More bubles formed and coating spread out over bottom like milk | Green coating completely dissolved | Completely broken down | No change | | 1 | 5 | 8 | 3 | 4 | 10 | 10 | | 2 | 5 | 7 | 4 | 4 | 9 | 10 | | 3 | 5 | 8 | 2 | 5 | 10 | 10 | Stirred | | Mixture is cloudy, sediment present | | Didn’t stir easily, gooey and

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