a standard solution of oxalic acid and use it to standardize an unknown sodium hydroxide solution. Purpose 13C: 1. To titrate a hydrochloric acid solution of “unknown” concentration with standardized 0.5M sodium hydroxide. 2. To titrate a hydrochloric acid solution of “known” concentration with standardized 0.5M sodium hydroxide. 3. To titrate an acetic acid solution (vinegar) with standardized 0.5M sodium hydroxide. 4. To utilize the titration results to calculate the molarity of the hydrochloric
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Yes | Light bubbles | Light but more visible bubbles and light brown liquid | Copper Sulfate (CuSo4) | Yes | Light bubbles | Changes color to brown and oxidation is observed | Ethanol (c2H5OH) | No | Nothing changes | Nothing changes | Calcium Hydroxide (Ca(OH)2) | Yes | Light bubbles | Light bubbles but more than in anode | Potassium Bromide (KBr2) | Yes | Produced yellow color and bubbles | Bubbles | Sodium Iodide (NaI) | Yes | Produced yellow brown and bubbles | A lot
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Chemical Reactions I. Purpose – The purpose of this lab was to observe different type of chemical reactions to write and balance chemical equations. II. Hypothesis: If you mix two chemicals together‚ then they will change color and/or bubble/fix. III. Procedure - Workstation 1: 1. Light the Bunsen Burner 2. Add 5 – 8 mL of HCL to a test tube that’s in the test tube rack 3. Drop a 2 – cm piece of Mg ribbon into the test tube 4. Record Observations 5. Clean Workstation
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Chloride(BaCl2) 6M HCl(Hydrochloric acid) Silver Nitrate(AgNO3) 1M Potassium Nitrate(KNO2) Calcium Chloride (CaCl2) Barrium Hydroxide Ammonium Hydroxide (NH3OH) Methylene Chloride Test Tube/Test Tube Holder Eye Dropper Eye Dropper Beaker Pipette Pipette Bulb Litmus Paper Hot Plate Observations/Calculations: CO3 + H2SO4 = bubbly reaction‚ little to no colour change. CO3 + 6M HCl = Barrium hydroxide began to go cloudy‚ indicating the presence of BaCO3(Carbonate anions) Chloride
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Concentration of Hydrochloric Acid in a Given Solution by ARAKA BRAMWEL MBOGO EN251-0221/2010 TITLE: STANDARDIZATION and DETERMINATION OF THE CONCENTRATION OF HYDROCHLORIC ACID PRESENT IN A GIVEN SOLUTION Aims: To be able to standardize Sodium Hydroxide (NaOH) solution using a standard solution of Oxalic acid. To be able to prepare standard solutions. To determine the strength of a given solution of Hydrochloric acid (HCl) To analyze errors that occur during standardization experiments. Introduction:
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+ water + carbon dioxide Element | Symbol | Valency | Hydrogen | H | 1 | Oxygen | O | -2 | Carbon | C | 4 | Calcium | Ca | 2 | Iron | Fe | 2 | Aluminium | Al | 3 | Sodium | Na | 1 | Potassium | K | 1 | Magnesium | Mg | 2 | Zinc | Zn | 2 | Copper | Cu | 2 | Silver | Ag | 1 | Lead | Pb | 2 | Chloride | Cl | -1 | Sulphate | SO4 | -2 | Hydroxide | OH | -1 | Carbonate | CO3 | -2 | Nitrate | NO3 | -2 | Phosphate | PO4 | -3 | Hydrogen Carbonate | HCO3 | -1 |
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will be organic solvent that is insoluble in water.The organic solvent used have to be volatile because it can be easily removed by evaporation when forming crystals. Phenolic compounds will undergo salt formation with sodium hydroxide solution‚ NaOH.Therefore‚sodium hydroxide solution is allow to use to extract a carboxylic acid or phenolic compound from its solution in an organic solvent.An organic solvent can be used to remove organic impurities from a carboxylic acid or phenol dissolved in aqueous
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neutralising soil; it is a sedimentary rock that is commonly found in quarries. It is a compound consisting of calcium‚ carbon and oxygen called calcium carbonate (CaCO3). As it is a solid it would be very hard to neutralise soil with it so it has to be broken down and made into a liquid form called calcium hydroxide (CaOH2) made up of calcium‚ carbon‚ oxygen and hydrogen. This calcium hydroxide can then be sprayed on the fields to neutralise the soil. Stings When we get stings e.g. wasp‚ bee‚ stinging
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carbonate. c. Calcium metal reacts with water to form calcium hydroxide and hydrogen gas. d. Potassium nitrate decomposes to form potassium nitrite and oxygen. e. Barium metal reacts with Iron (III) sulfate to produce barium sulfate and iron metal. f. Barium chloride reacts with sodium sulfate to produce barium sulfate and sodium chloride. g. Bismuth (III) oxide and zinc metal react to produce zinc (II) oxide and bismuth metal. h. Calcium metal reacts with phosphorus to produce calcium phosphide
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iron and salt are added. Passivation is the process by which a material is made less reactive‚ usually by the deposition of a layer of oxide on its surface: if you place a strip of magnesium into cold water‚ its surface will oxidise to magnesium hydroxide (Mg(OH)2)‚ and this coating will prevent further reaction. Therefore‚ in the heater meal‚ iron is added to the magnesium‚ leading to the production of a local cell – small-scale corrosion that happens where two metals of different reactivity are
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