Biomagnification speech DESRIPTION OF THE ISSUE Biomagnification is the accumulation of substances‚ especially many chlorinated hydrocarbons that are used as pesticides. Common chlorinated hydrocarbons include DDT‚ dieldrin‚ and PCBs. These chemicals are insoluble in water‚ but highly soluble in organic solvents like animal fats and plant oils. Due to their insolubility‚ they are persistent in the environment and cannot be broken down by any natural processes. HISTORY OF THE PROBLEM DDT was first
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LAB 3.Ø.Ø: do ions combine in definite ratios PURPOSE The purpose of this investigation is to determine whether ions combine in definite ratios or not. To observe‚ and create a table of the different ions. QUESTION If copper (II) sulfate when mixed with sodium carbonate at different quantities combine to form ions in definite ratios. HYPOTHESIS / PREDICTION I believe that the ions will combine in definite ratios due to the fact that the valance electrons will not be changing throughout any
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Chem 28 Problem Set 1 Date due: August 26‚ Tuesday 10:00 am General Instructions: - Place answers in 1 long ruled pad paper. - Show all necessary calculations and proper conversion of units. Final answers should be in proper significant figures - Box all final answers 1.) In a precipitation reaction‚ 150.0 mL of 0.200 N NaOH was mixed in 50.0 mL aluminum nitrate solution to precipitate all the Al3+. a.) What is the normality of Al(NO3)3? b.) What is the molarity of the solution in 1
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The titration experiments between the three different brands and under the five different conditions showed varied results. As shown in Graph 1‚ the condition which tested most effervescent was when the soda water was under cold temperatures and the least effervescent temperature was when the soda water was warm. When left standing without the lid‚ the soda water proved to be least effervescent. As seen in the above graph‚ under cold temperatures‚ ‘Schweppes’ demonstrated that it was the most effervescent
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The Physical Properties of Eleven Chemical Compounds Problem: Discover whether various chemical compounds are molecular or ionic and if they are acidic or basic. Hypothesis: If the compound is ionic‚ then it will be soluble because the energy given off water molecules compensates for the energy needed to break ionic bonds‚ also‚ if the compound is Ionic‚ it will be an electrolyte‚ because they mostly break up into ions when in water. If the compound is molecular‚ then it will be soluble‚ it cannot
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Task 3: How could Thin Layer Chromatography (TLC) have been used to prepare a pure sample of aspirin? The method of using thin layer chromatography is easy‚ quick and relatively cheap to carry out this makes it ideal for preparing pure samples of aspirin. Equipment Required: • Thin Layer Chromatography Paper • Ruler • Pencil • Solvent • Beaker • Micro Capillary • Access to a fume cupboard • UV light • Clingfilm • Individuals sample of aspirin • Pure sample of aspirin • Sample of salicylic acid Method:
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Exp. No: 6 Date: 31st october 2013 Name of the experiment: Identification of basic radical ( Al3+ & Mg2+ ) from supplied marketed dosage form Aim: To identify basic radical ( Al3+ ‚Mg2+ ) from supplied marketed dosage form. Apparatus and reagents: Test tube Mortar pestle Dilute HCl Disodium hydrogen phosphate NH4OH AlCl3 NaOH Cobalt nitrate Ammonium carbonate Preparation
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Do you ever wonder why a boat floats and a rock doesn’t? Well I do. A Boat floats because of buoyancy and it remains lighter than the amount of water it displaces. Buoyancy is an interesting topic. Buoyancy can happen in any fluid and air. The buoyant force applies not just to water but to any fluid...A fluid is a substance that is able to take the shape of a container in which it is placed.” The source of this information is http://blackbirdlibrary.pbworks.com/w/file/fetch/70171466/dFlaoting
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Comparison between Organic and Inorganic Compounds Organic Compounds | Inorganic Compounds | *Organic Compounds are composed of few elements only.C‚ H‚O‚N‚S‚P and halogens are the most common. | * Inorganic Compounds are composed of all the known elements. | *They are generally found in living matter‚ i.e.‚ animals and plants. | *They are generally obtained from non-living matter‚ i.e.‚ minerals. | *They are usually gases‚ liquids or solids having low melting points. | *They are usually solids
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|| || Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 Convert 1.0g of CaCl2-.2H2O to moles of CaCl2-.2H2O 1.0g x 1 mole CaCl2-.2H2O 147.0 g CaCl2-.2H2O = 0.00680 moles CaCl2-.2H2O The mole ratio is 1:1 Hence if we have 0.00680 moles of CaCl2-.2H2O we will as well need 0.00680 moles of Na-2CO3 Convert moles of Na-2CO3 to grams of Na2CO3 = 0.00680 moles Na-2CO3 x 105.99g Na-2CO3 1
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