Green Chris Christopher is in his last year of his degree in Agrobiology. He needs to complete a 6 months internship with the Agri-food and Veterinary Authority AVA of Singapore. He has prior experience in growing crops of tomato and achieving at least a 95% yield. In the lab‚ his supervisor Dr Ong decided to challenge him. Dr Ong said: “Hi Christopher‚ welcome to our AVA laboratory. We are pleased to have you here. We have some problems growing Rhododendron.” Christopher replied: “Thank you
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A Titration is a process of the concentration of one solution being determined by its reaction with either a standard solution or a known quantity of solid dissolved in solution. It may also be used to calculate the molar mass of an unknown acid or base. Purpose: I. Prepare a standard solution of sodium hydroxide II. Standardize a sodium hydroxide solution by using potassium hydrogen phthalate (KHP) III. When given whether the acid is monoprotic‚ diprotic‚ or triprotic ‚ determine the
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Lab Report: Photosynthesis Your Name: Purpose of this Lab What is the goal of this lab? What question are you trying to answer‚ or what problem are you trying to explain? | Hypothesis After reading the lab instructions - but before starting the lab - record your best “educated guess” about what will happen in the experiment. Explain what lead you to this hypothesis. | Experimental Design List the materials used in this lab‚ and a brief explanation of the procedures you followed
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CERTIFICATE This is to certify that this dissertation titled “ A Brief study of the Comparative Acidity of Some Commercially available Antacids” Submitted by Sanat Kumar Saha to the department of chemistry ‚ Darrang College ‚ Tezpur was carried under my guidance and supervision during the academic year 2013-14. I wish him success in life. Date : DR Palashmoni Saikia
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MEASURING pH Date of Lab: 02/09/13 Date Report submitted: 02/26/13 Purpose of the experiment By doing this experiment‚ we were trying to learn how to measure a pH with a pH meter to determine whether a solution is weakly‚ moderately or strongly acidic or basic; but also to compare the different data founded to see how the addition of certain liquid to a solution may affect the pH of the initial solution. Materials We used: * Tap water‚ distilled water‚ Soda and milk as the main
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procedure is to weigh out your acid‚ dissolve it in water‚ add a couple drops of the indicator (phenolphthalein)‚ and then add the sodium hydroxide until you note a color change (from clear to pink). When the color change occurs‚ you have added enough base to completely react with the acid (the endpoint). You are allowed three trials‚ and will be graded on accuracy. Lab Questions: 1. HA(aq) + NaOH(aq) NaA(aq) + H2O 2. Trial 1: .1010 M of NaOH = moles of NaOH / 0.0299 L = 0.0030199 mols of NaOH Trial
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This allows us to control a solution so that precipitation of a compound will not occur‚ or to find the concentration needed to cause a precipitate to form. The solubility product which will be determined by this experiment is that of the strong base‚ calcium hydroxide‚ Ca(OH)2. Materials and Equipment Calcium nitrate‚ Ca(NO3)2‚ 0.10 M Sodium hydroxide‚ NaOH‚ 0.10 M (2) 96-well micro-wellplates 50-mL beaker Small dropper bottles for Ca(NO3)2‚ NaOH‚ and H2O (2) disposable pipets for mixing Note
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In labs 4.1‚ 4.2‚ and 4.3‚ the connection between the force of gravity and the type of surface was tested through a series of experiments. In lab 4.1‚ the force of gravity was tested through various surface types‚ including: tabletop‚ waxed paper‚ paper towel‚ fine sandpaper‚ and coarse sand paper. In lab 4.2‚ two different surface types that were tested included: tabletop and coarse sand paper. This lab compared the two averages between both tabletop and coarse sandpaper using different amounts
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Determination of the concentration of ethanoic acid in commercial vinegar Introduction: The aim of the experiment was to determine the molarity of ethanoic acid in table vinegar by titrating a sample with alkali sodium hydroxide (NaOH) with a known concentration of 0.1molL-1. The equation of the reaction between ethanoic acid and sodium hydroxide is as follows: CH3COOH + NaOH CH3COONa + H2O When the titrations end point is determined and volumes of reactants are measured the concentration
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Chemistry AP Chapters 4 and 5 Practice Test 1. Which of these compounds is a weak electrolyte? A. HCl B. CH3COOH (acetic acid) C. C6H12O6 (glucose) D. O2 E. NaCl 2. The balanced net ionic equation between aqueous diethyl ammonium chloride and aqueous potassium hydroxide contains which of the following species? A. KCl(s) B. 2 OH-1 C. (CH3CH2)2NH2 (aq) D. H3O+1 E. (CH3CH2)2NH2+1 (aq) 3. In the chemical reaction 5H2O2 + 2MnO4-
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