Be sure to stir the mixture for 2 minutes after adding sodium thiosulfate. Repeat the potassium iodide-starch test to make sure that there are no oxidize agent left in the mixture. Once done‚ the mixture will be tested for it pH level. If the mixture is too acidic‚ then add sodium bicarbonate‚ as necessary‚ to reduce acidity. In the next step‚ add enough sodium chloride so that a small amount will remain after stirring. This will decrease the solubility of
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In the Stoichiometry Challenge Lab we compared the theoretical results of the reaction between sodium carbonate (Na2CO3) and sulfuric acid (H2SO4) with the actual data we found. I hypothesised that If the mole ratio between Na2SO4 and H2SO4 is 1:1 then when I react 0.5 grams of Na2SO4 (reactant with H2SO4) I should get 0.669 grams of Na2SO4. The actual reaction between .05 grams of Na2CO3 and 5 mL of of H2SO4 produced 0.79g of Na2SO4. When I were testing the reaction‚ I measured out the reactants
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In order to describe the molar volume of pure water the equation V_3=M_3⁄ρ_(3 ) is used‚ whereas those of sodium nitrate and the polyether compound poly(ethylene glycol) (PEG) are shown by V_1=V_(∅_1)^∞and V_1=V_(∅_2)^∞. In these two equations‚ V_(∅_1)^∞ and V_(∅_2)^∞ which are the apparent molar volumes at infinite dilution of sodium nitrate and poly(ethylene glycol)‚ must be computed on the basis of data on apparent molal volume (V_∅). The following equation shows the relation of the V_∅ of a
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Designation: D2972 – 08 Standard Test Methods for Arsenic in Water1 This standard is issued under the fixed designation D2972; the number immediately following the designation indicates the year of original adoption or‚ in the case of revision‚ the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. 1. Scope 1.1 These test methods2 cover the photometric and atomic
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point is signalled by the change in color of the solution because of the presence of pH indicator. The common used indicator is phenolphthalein; it is colorless in acidic solution and pink in basic solution. In this lab‚ the concentration of sodium hydroxide (NaOH) was determined by using a known amount of Potassium Hydrogen phthalate (KHP). The balanced chemical equation for the reaction is: KHC8H4O4(aq) + NaOH(aq) => H2O(l) + KNaC8H4O4(aq) (1) KHP was chosen as a good acid to standardize
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200 Things to Know to Pass the Chemistry Exam 1. Protons are positively charged (+) with a mass of 1 amu. Example: Which has the greatest nuclear charge? Cl-35 Ar-40 K-39 Ca-40 2. Neutrons have no charge and a mass of 1 amu. 3. Electrons are small and are negatively charged (-) with a mass of almost 0 amu.. 4. Protons & neutrons are in an atom’s nucleus (nucleons). Which has the greatest number of nucleons? Sn-119 Sb-122 Te-128 I-127 5. Electrons are found in “clouds”
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Aim To prepare a sample of cuprammonium rayon threads from filter paper Apparatus Required a) Conical flask (preferably 250 ml) b) Funnel c) Glass rod d) Beaker (preferably 250 ml) e) Water bath f) Filter paper (Whatman paper or ordinary filter paper sheets. Preferably‚ Whatman) Chemicals Required a) CuSO4 b) NaOH solution c) Liquor ammonia solution d) Dilute H2SO4 e) Whatman Paper f) Distilled H2O Background Rayon is a synthetic
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Aluminium Hydroxide (AL(OH)3 ATH D50 1-2um) industry. This report has firstly introduced Global TOP10 Ultra Fine Aluminium Hydroxide Suppliers Ultra Fine Aluminium Hydroxide Production Specifications UF ATH Capacity Production Price Cost Profit Production Value UF ATH sales by products by regions by applications sales clients UF ATH manufacturing technology and manufacturing cost structure etc details information. And then Summary statistics of Global and China TOP10 Ultra Fine Aluminium Hydroxide manufacturers
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Determining the percent Concentration of a given Solution using Titration Morphy Kuffour Mrs. Langlis‚ AP Chemistry C-D 9/24/2017 Purpose: Determining the precise concentration of vinegar through titration using a standard solution of Potassium Hydroxide (KOH) (aq) Background: Vinegar is a solution of acetic acid (CH3COOH) in water. The concentration of acetic acid in Vinegar is written as a Molarity (mol/L). In this experiment‚ titration is used to determine the concentration of acetic acid in vinegar
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Title Soda Ash: Great for the economy but detrimental to the body; So why is it involved in everyday life? Abstract Sodium carbonate‚ Na₂CO₃‚ commonly known as soda ash is used in the manufacturing of many economically important products such as the manufacturing of glass‚ chemicals‚ paper and detergents. Since sodium carbonate has a strong base‚ it is commonly used to neutralize acidic effects. Soda ash has a high pH in concentrated solutions and can irritate the eyes and skin as well
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