experiment? – To allow easy mixing of solutions by swirling. 2. Why is the funnel removed from the burette after adding the acid solution? – so that the drops from the funnel will not fall into the burette. 3. In using a burette‚ why is it important to (a) rinse it with a little of the solution it is going to contain? – to remove any residual water and so avoid dilution of the acid solution when it is poured into the burette. (b) to clamp it vertically? – to enable the liquid level to be read correctly
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Unit 3 assessment O1 Analysis of fertiliser-an extended experimental investigation Background: In this investigation you will analyse the composition of a lawn fertiliser‚ or ‘lawn food’. You may use external sources to help you complete the this section. Q1. Why is each of the elements Nitrogen‚ Phosphorus‚ sulfur and iron included in lawn food? ______________________________________________________________________________________________________________________________
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a Double Displacement. C.) Zinc and Hydrochloric Acid‚ my hypothesis is a Single Displacement. D.) Alcohol and Oxygen‚ my hypothesis is a Combustion. E.) Lead (II) Nitrate and Potassium Iodide‚ my hypothesis a Double displacement. F.) Copper and oxygen‚ my hypothesis is a synthesis. G Magnesium and oxygen‚ my hypothesis is a synthesis. H.) Acetic acid and Sodium bicarbonate‚ my hypothesis is a double displacement. I.) Copper (II) carbonate and Hydrochloric acid‚ my hypothesis is a double displacement
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Section Assignment 3.4 Part F – The Reaction of Iron Nails with a Copper Solution Introduction: The experiment in this activity involves the reaction between a copper (II) chloride solution with iron nails and the mole ratios involved in the reaction. Measurements are taken to determine the moles of each reactant involved in the reaction and thus the number of atoms or molecules involved. Apparatus and Materials: Refer to the reaction of iron nails with a copper solution assignment in Module
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with an acid? Theory/Hypothesis: In this experiment the researcher and their team will be performing tests on a catalyst (proteins found in potato) to see what will happen when the catalyst in a Hydrogen Peroxide reaction is treated with an acid before the reaction occurs. The researcher hypothesizes that the after treating the catalyst with an acid the amount of gas pressure produced will decrease. Variables: The independent variable in this experiment is the pH level/amount of acid added to
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marble chips and hydrochloric acid‚ and to see what differences in the rate of this reaction arise when different concentrations of acid are used. Below is the word equation for this reaction: Calcium Carbonate + Hydrochloric Acid = Calcium Chloride + Carbon Dioxide + Water Below is the fully balanced chemical equation for this reaction. CaCo3 + HCl  CaCl2 + CO2 + H2O Aim The aim of this investigation is to find out whether the concentration of the acid affects the rate
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phenolphthalein indicator – saturated barium chloride (BaCl2) – sodium dichromate crystals – concentrated hydrochloric acid – water glass – wine glass – milk glass – beer mug | Safety | All chemicals must be handled carefully and with respect. The solids and liquids used in this inquiry are safe for you to use with the following precautions: * It is recommended that safety glasses be worn. * Acids and Bases are caustic in high concentration; therefore‚ concentrations being used should be diluted
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Mandatory Experiment 6.2 Studying the effects on reaction rate of (i) concentration and (ii) temperature Theory The reaction used is that between a sodium thiosulfate solution and hydrochloric acid: 2HCl(aq) + Na2S2O3(aq) → 2NaCl(aq) + SO2(aq) + S(s)↓ + H2O(l) The precipitate of sulfur formed gradually obscures a cross marked on paper and placed beneath the reaction flask. The rate of reaction‚ and consequently the time taken to obscure the cross‚ depends on a number of variables such
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Rubber Stopper‚ Gas Syringe METHOD: 1. Wash all apparatus. 2. Measure and transfer 5g Calcium Carbonate to Petri Dish. 3. Measure and transfer 25cm3 of HCL to Beaker. 4. Place acid into conical flask and Calcium Carbonate and cover Immediately with rubber stopper to prevent gas from escaping. Apparatus should adopt the fashion below: Diagram showing apparatus set up.
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rocks Acetic Acid Looks like a clear liquid Solution of Sodium Thiosulfate Looks like a clear liquid Granular Zinc Looks like shredded pieces of silver Iodine Crystals Looks like small silver balls Zinc Ion and Iodine-Iodide-Triiodide ion in water Looks like a brown liquid Solid Zinc Iodide Looks like a white powder Mineral Oil Looks like a clear liquid Silver Nitrate Looks like a clear liquid Magnesium Turnings Looks like a small silver curved figure 3M Hydrochloric Acid (HCL) Solution
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