Title : Investigation of Action of Saliva and 3M Hydrochloric Acid in Two Carbohydrate Solutions Objective : To investigate the action of saliva and 3M hydrochloric acid in two carbohydrate solutions Results : Table 1: Observations Conclusions Solution A Benedict’s test : Initial blue solution changed to brick-red precipitate. Little amount of brick-red precipitate suspended in solution. The solution was translucent. Iodine test : Yellowish-brown remained the same. Abundant amount of
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Since an acid + carbonate Salt + water + Carbon Dioxide‚ and lime water (Calcium Hydroxide) precipitates to Calcium carbonate when exposed to CO2‚ then if the unknown substance is placed in Hydrochloric acid and the captured gas causes precipitation (precipitation in ionic compounds generally form if the opposite charged electrons of two substances are attached‚ hence those with same charges do not form precipitate) in the lime water‚ it must
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reaction rates and concentration (research paper) By katie prestage what are reaction rates? The rate of reaction is the speed in which a reaction takes place. This can be measured by the rate in which a reactant is used up‚ or the rate a product is created. If a reaction has a low rate‚ it means that the particles are combining at a slow speed. If the rate is high‚ it means that the particles are coming together at a fast speed. For example‚ the rusting of iron through oxidation has a slow
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magnesium reacts with a variety of dilute acids. In order to make comparisons between the acids‚ I shall use my results to work out how much heat would be given out if 1 mole of magnesium reacted with an excess of each acid. The acids I shall use are hydrochloric acid‚ sulphuric acid‚ nitric acid and ethanoic acid. What I already know Magnesium reacts with most dilute acids to give a magnesium salt and hydrogen. For example: Mg + 2HCl Mg + H2SO4 MgCl2 + H2 MgSO4 + H2 I discovered from an A’ level text
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3 Safety – PG 3 Strategy – PG 3‚ 4 Method – PG 5‚ 6‚ 7 Preliminary – PG 7 Actual experiment and graphs – PG 7+ Chemistry coursework Hypothesis/Aims The aim of the investigation is to see how different concentrations of hydrochloric acid affects the rate at which hydrogen gas is produced when it’s reacted with a strip of magnesium. The rate of reaction is a measure of change that happens in a single unit of time. When a reaction takes place the particles of the reactants
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benzoate + hydrochloric acid benzoic acid + sodium chloride Amounts: 2.00 g 5.0 mL 3M
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mole of hydrogen gas at STP using experimental data‚ known mathematical relationships‚ and a balanced chemical equation. Theory: The goal of this lab is to find the volume of one mole of hydrogen at STP. The experimenters will be working with hydrochloric acid and magnesium to find the objective. The acid in this lab will react to the magnesium and cause the water in the eudiometer to rise because of the reaction. The final volume should be 49.92mL.A Key theory to know for this lab is Avogadro’s
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gently until the solid is completely dissolved and record the highest temperature reached. Part II: The Reaction of Sodium Hydroxide Solution with Hydrochloric Acid Measure out approximately 100 mL of 0.50 M hydrochloric acid solution and 100 mL of 0.50 M sodium hydroxide solution. Record both volumes on your data table. Pour the hydrochloric acid solution into the calorimeter. Measure and record the initial temperature of each solution and record on your data table. Add the sodium hydroxide
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Conductivity of electricity of molten oxide E) Solubility in water F) pH of solution in water G) Classification of oxide (acidic‚ basic or amphoteric) H) Structure of oxide (simple molecular‚ giant molecular‚ giant ionic) I) Reactions with hydrochloric acid and/or sodium hydroxide. It is expected that some trends will appear across the period three oxides. Conductivity of electricity of molten oxide is likely to occur in the metal oxides as they have giant metallic structures which are capable
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4A.2 RRL 4A.2.1 Coagulation of Proteins Coagulation of protein refers to sticking together‚ like a blood clot‚ usually as a result of denaturation or coming out of solution due to abnormal ionic strength or a change of solvent. Definite characteristics of the proteins are changed when they are coagulated‚ among which is loss of solubility in water and dilute salt solutions. In some instances and under certain conditions the coagulation process may be reversible. (Campbell‚ et.al‚ 1979) 4A.2.2
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