LIMIT ON CHARACTERISTICS OF A TOOTH PASTE: CHARACTERISTICS LIMITS 1 Flavor Non-irritant to oral mucosa. Concentration should not exceed 1-2% 2 Size Price 3 Color Food dyes should be used. 4 Odor Pleasant 5 Antibacterial Xylitol: Helps reduce the development of cavities. Concentration should not exceed 25%. 6 Foaming Sodium Lauryl Sulfate (SLS) Concentration should be as low as 0.5%. Detergents used should be 1-3% 7 In toxic -Sodium fluoride a toxic chemical
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Play Doh This is possibly the easiest play dough recipe ever. It takes about 5 minutes to make and best of all there is no cooking. Just throw all the ingredients in a bowl and mix. Simple as that. It’s great for making with kids and will last for ages. You can add glitter to the mix for added sparkle and even some peppermint oil to make it smell great. You will need: 1 cups plain flour 1/2 cup of salt 2 tablespoons of cream of tartar (optional) 1 tablespoons of cooking oil Food colouring
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Study of Solubility Equilibrium of Potassium Hydrogen Tartrate Wang Haina 1. Aim 1. To determine the solubility of potassium hydrogen tartrate (KHT) at various temperatures from 10°C to 50 °C‚ and determine the corresponding Ksp at these temperatures. 2. To obtain the changes in enthalpy and entropy of the dissolution of KHT from the dependence of Ksp on temperature. 2. Results and discussion 2.1 Collection of data A portion of KHT (1 to 1.5 g) was added into about 100 mL of deionised
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Title: The Green Oxidation of Borneol to Camphor Date Conducted: February 8‚ 2012 April 27‚ 2012 Abstract: The goal of this experiment was to perform a Green Oxidation of Borneol to Camphor‚ without the use of Chromium synthesis since it is toxic to the environment. Reagent Table: |Chemical Name |Amount used |Molecular weight |Concentration |Density g/mL |BP °C |MP °C |Chemical Formula
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Report of redox titration--- Iodine titrated against sodium thiosulphate Objectives The objective of this experiment is to balance the equation for the reaction between sodium thiosulphate and iodine. Principle As the reaction between sodium thiosulphate and iodine is a redox reaction‚ so I make use of this to perform a redox titration‚ iodine titrated against sodium thiosulphate. From the experimental result‚ I can find out the number of mole of the two substances‚ hence I can calculate
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Purpose The purpose of this experiment is to observe a redox reaction and understand what it means. We will observe the new bonds formed and the importance of the electron in the formation of these new bonds. Materials Boileezers (boiling chips) Desiccant 0.17M acetic acid (acidified water) Solution of Sodium thiosulfate Granular zinc Iodine crystals Zinc ion and iodine-iodide-triiodide ion in water Solid zinc iodide Mineral oil Silver nitrate Magnesium turnings 3M Hydrochloric acid (HCl) solution
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EXPERIMENT 10 Volumetric Analysis I Standardization of NaOH Solution Outcomes After completing this experiment‚ the student should be able to: 1. 2. 3. 4. Demonstrate the concept of quantitative analysis. Make solution and standardize it. Explain the difference between primary and secondary standard solutions. Quantitatively determine the concentration of a base. Introduction Titration is a common method of quantitative analysis used to determine the concentration of an unknown substance in a solution
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Shiela Mae Molina Date Submitted: July 12‚ 2013 Experiment 3 ACID – BASE TITRATION I. Objectives * Determine the purity of Potassium Acid Phthalate * To titrate effectively II. Data and Results A. Measurement of the Relative Strengths of Acid and Base B. Standardization of Sodium Hydroxide Primary Standard used: Potassium Acid Phthalate (KHP) Formula Mass of Primary Standard: 204.22 g/mol% % Purity of Primary Standard: 99.9% Trials | 1 | 2 | 3 | Mass
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proceeding to the titration of soft drink samples‚ the exact concentration of NaOH must be known through the process of standardization which involves performing a titration with a known amount of a stable acid‚ which in this case is the monoprotic acid potassium hydrogen phthalate.
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Formula: for NaoH N NaoH = grm KHP / ml NaoH x KHp /1000ml Formula: for HCL (NV) HCL = (NV) NaoH or N HCL V HCL = N NaOH V NaoH N HCL = VNAOH (NNaoH) / VHCL (for more info page 62-63 of the photocopy) KHP = Potassium hydrogen phthalate = KHC8H4O4 = Mw - 204.23 Trial 1: NNaoH = 1grm / 20.6 x 204.23 /1000 = 1grm / 4.21 = 0.24 normal NHCL = 20.6 (0.24) / 39.5 = 4.94 / 39.5 = 0.125 or 0.13 Trial 2: NNaoH = 1grm / 20.8 x 204.23 /1000
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