and the sodium hydroxide. When using glassware in experiments‚ it must be flushed out to make sure that cross contamination does not happen and that the only thing that would then be coating the beaker is the distilled water. When all of the glassware has been cleaned‚ some sodium hydroxide should be placed in a plastic weighing boat next to the scales and place the second weighing boat on the scales and weigh it then click the on tare button to set it back to zero and weigh out 1g of sodium hydroxide
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In experiment 3.1.We set up and calibrate the spectronic 20 first since it takes time to be ready to use so‚ we turned the spectronic 20 to warm up for at least 15 minutes‚ set wavelength to 360 while no test tube in it. Also‚ we set the filter lever in order to match the wavelength range‚ and then set the transmittance to 0%‚ then we changed the mode to absorbance. After we labeled two test tubes which were #5 and #10‚ we inserted water first to set 0 absorbance‚ then we used #5 sample to read it
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between the corrected number of moles and grams of urea and the amount of urea used originally used in the experiment‚ so the ammonium chloride will be primarily compared to the corrected amount of urea to make sure that the amount of solvent is equal. Graph 1 and 5 and Data Table 2 show that the mass of solutes were overall very similar: 8.735 grams of ammonium chloride and 8.99 grams of urea. Overall‚ this experiment proved that the freezing point depression is a colligative property that depends on
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Neutralization experiment AIM:- To investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl)‚ Sulphuric acid (H2SO4) etc. An alkali is a
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Preparation of Potassium Chloride 10% (w/v) Oral Solution Questions: 1. One source of potassium chloride occurring in nature is carnallite. What is its chemical formula? What are the others sources of potassium chloride? KMgCl3• 6H2O Other sources: • Sylvite • Halite 2. What are the therapeutic uses of potassium chloride? -drug used to maintain or restore potassium levels in patients with potassium deficiency‚ which can cause such problems as thirst‚ fatigue‚ low blood
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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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Reagents used: Distilled Water Hydrated Sodium Borate 1.0 M Hydrochloric acid Screened methyl orange Sodium Borate solution Method: Prepare a standard solution of hydrated sodium borate (250cm3 solution) Place the weighing bottle on the balance and record the mass of the empty bottle. Add approximately 4.80 grams of the hydrated sodium borate compound into the weighing bottle and record their weight together. Transfer the measured hydrated sodium borate to the 250 cm3 beaker then find the
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The rate of reaction between sodium thiosulphate and hydrochloric acid Candidate name: Yeo Jin Kim (Kimberly Kim) Candidate number: 000791-021 Teacher: Yitao Duan 1.0 Aim The aim of this experiment is to investigate the changing of concentration effect the rate of reaction between sodium thiosulphate and hydrochloride. 2.1 Chemical Equation 2.0 Raw data 3.2 Qualitative Data 2.1.1 Before the experiment Substance | Color | State | Smell | Hydrochloride (HCl) | Colorless
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PurposeIn this experiment‚ sodium hypochlorite (NaOCl) in acetic acid mixture was used to oxidize emdo-borneol (an alcohol) to camphor (a ketone). The product would then be purified by sublimation and then be analyzed by Infrared spectroscopy and melting point test. Procedure and ObservationsPlease refer to the lab manual and the carbon copy attached. Data and CalculationsWeight of endo-borneol = 0.2013gNo of moles of endo-borneol = 0.2013g/154.25g mol-1 = 1. 305mmolSince one mole of endo-borneol
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Determination of the Empirical Formula for Zinc Chloride Name:__________________________________________ Course______ Period:____ Prelab Show your Calculations for the following problems 1. How many grams of sulfur would combine with 26.1 g of potassium to form K2S? 2. A 1.31g sample of sulfur was reacted with chlorine to form 4.22g of compound. What is the empirical formula of the compound? 3. 0.256g of a lanthanum oxide was decomposed and produced 0.219g of lanthanum. What is the
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