BTEC Chemistry – Titration experiment I – Standard Solution Prep Preparation of a standard solution of sodium carbonate Anhydrous sodium carbonate is a suitable chemical (primary standard) for the preparation of a standard solution. Standard Solutions are critical in chemistry because you need to have solutions with an EXACT known concentration and volume. Chemicals/Materials: solid sodium carbonate (Na2CO3) distilled water Apparatus: 250cm3 volumetric flask 250cm3 beaker Glass
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Title : Expt.1 Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Experiment no : 1 Experiment title : Determination of the enthalpy (heat) of reaction of a monobasic acid with sodium hydroxide Objectives: 1) To understand the enthalpy chemistry. 2) To determine the calorimeter constant. 3) To determine the enthalpy reaction of acid-base reactions. 4) To study the exothermic reaction. Apparatus and Materials : * Dewar flask
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How reaction rate varies with sodium thiosulphate concentration Background information Sodium thiosulphate and hydrochloric acid are both colourless liquids‚ when the two reactants are reacted together they produce sulphur. The sulphur that is produced from the reaction changes the solution to yellow and cloudy‚ this is a precipitation reaction‚ where a two solutions react and a solid forms in the solution‚ the solid is said to precipitate out. Some reactions will occur quickly such as fireworks
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because it is known for being free from artificial colours‚ flavours and preservatives. Materials Burette Stand Beaker Funnel Pipette Three different brands of vinegar Sodium Hydroxide Phenolphthalein Indicator Safety Glasses Method 1. Put on safety glasses and gather all materials needed. 2. Ask a teacher to pour Sodium Hydroxide into your burette. Make sure the initial reading is at 0mL 3. Using a pipette‚ measure 5mL of the brand of vinegar you will be testing and pour it into your beaker. 4
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The Dissolving of Solid Sodium Hydroxide in Water Procedure: 1. Measure out approximately 200 mL of distilled water and pour it into the calorimeter. Stir carefully with a thermometer until a constant temperature is reached. Record the volume of water and the constant initial temperature of the water on your data table. 2. Place a plastic measuring trough on top of the digital balance‚ and then zero the balance (press the tare button) so that the mass of the trough will be "ignored" and
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The color change can occur quickly‚ so be ready to stop the valve. In the “rough” section of the report sheet‚ record the initial‚ final and net volume (Vfinal-Vinitial). Refill the burette with sodium hydroxide until it reaches the 0.00 mL mark‚ and allow some to run through the burette tip into the titrated solution. Repeat steps 9 through 11‚ using the remaining two flasks‚ marking them “trial 1” and “trial 2.” To estimate the amount of titrant
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Lye is a corrosive alkaline substance‚ commonly sodium hydroxide (NaOH‚ also known as ’caustic soda’) or historically potassium hydroxide (KOH‚ from hydrated potash). Previously‚ lye was among the many different alkalis leached from hardwood ashes.[1] Today lye is commercially manufactured using a membrane cell method. Solid dry lye is commonly available as flakes‚ pellets‚ microbeads‚ and coarse powder. It is also available as solution‚ often dissolved in water. Lye is valued for its use in food
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Determination of the Concentration of Acetic Acid in Vinegar Lab Exercise 4 CHEM 1106 9/19/12 Purpose: Standardize a sodium hydroxide solution using a primary standard acid. Determine the molarity and the percent by mass of acetic acid in vinegar by titration with the standardized sodium hydroxide solution. Introduction: Vinegar is a dilute solution containing acetic acid. Since vinegar has a low pH‚ it can be titrated with a base. Titration is a method used in order to ascertain
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Background Research Scanning Tunneling Microscope; or STM‚ allows scientists to image or display crystalline material surfaces down to an atomic level. Basically; it shows the formation of surface atoms on conducting and semi-conducting materials such as metals‚ or metalloids. First invented by Gerd Binnig and Heinrich Rohrer in 1981; the Scanning Tunneling Microscope used quantum tunneling to extract atomically resolved images to understand the morphology of crystalline surfaces including both
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an esterification process that is used to make so from the hydrolysis of fats and oils. This process have the glycerol molecule‚ and a sodium carboxylate salt in most case sodium stearate being formed‚ however this salt depends on the base being used. In the experiment 23ml of vegetable oil was mixed with 20ml of ethyl alcohol along with 20 ml of 25% sodium hydroxide in a 250-mL Erlenmeyer flask. The content was then heated on a water bath whilst gently mixing with a glass rod. After 20 minutes of
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