Objective: • To learn some technique in volumetric analysis: Redox titration. • To review the stoichiometry of an oxidation-reduction reaction. • To practice the titration technique. • To determine the concentration of an unknown sodium oxalate (Na2C2O4) solution by titrating it against standardized potassium permanganate solution (KMnO4). Principle: Redox reaction is just like an acid-base reaction. An acid can show its acidic properties in the presence of base only. Like acid-base
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deionized water were added to the 150 mL beaker and stirred with the FeCl3 until complete dissolution occurred. The oxalate solution (K2C2O4H2O) from the 125 mL Erlenmeyer flask was added to the 150 mL beaker with iron(III) chloride solution (FeCl36H2O) and stirred thoroughly. 3 mL of deionized water were then added to the 125 mL Erlenmeyer flask‚ which previously held the oxalate
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from which a substance precipitates or crystallizes Filtrate- liquid that passes through the filter Slurry- suspension of solid in liquid Calcium ion can be analyzed by precipitation with oxalate in basic solution to form CaC2O4.H2O The precipitate is soluble in acidic solution because the oxalate anion is a weak base CaC2O4.H2O (calcium oxalate monohydrate ; MW = 146 g/mol) Equation: Ca2+(aq) + C2O42-(aq) CaC2O4.H2O Large‚ easily filtered‚ relatively pure crystals of product
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the limiting reactant‚ possibly‚ is the most effective. In this experiment we were able to calculate limiting reactants from the reaction of CaCl2. 2H2O + K2C2O4.H2O(aq). As a group‚ we obtained our salt mixture of calcium chloride and potassium oxalate‚ and weighed the mixture. We were able to make an aqueous solution from the mixture and distilled water. We boiled and filtered off the solution‚ leaving the precipitate. Once the precipitate was dried overnight‚ it was weighed and the mass was measured
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+ 10CO2 (g) + 8H2O (l) Volume of potassium manganate (KMnO4) = 32.5 mL Mass of Sodium Oxalate (NaC2O4): 0.104 [KMnO4] Calculation: = (0.104g of NaC2O4)(1 mol NaC2O4 /134.0g)(2 mol KMnO4 / 5 mol NaC2O4)(1/32.5 mL)(1000 mL /1L) = 0.00955 M KMnO4 2. Using the standardized concentration of KMnO4 calculated above to find the mass percentage of the oxalate ion Equation: Volume of KMnO4 reacted with Oxalate ion = (Vol of KMnO4 used in titration - Vol of KMnO4 used in blank titration) Titration Trial
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are slightly more acidic than solutions of acetic acid. Traces of citric acid are found in numerous plants and animals‚ because it is a nearly universal intermediate product of metabolism. Large amount of the acid are found in the juice of citrus fruits‚ from which it is precipitated by the addition of lime; the resulting calcium citrate is treated with sulfuric acid to regenerate the citric acid. Fermentation of sugar by the mold Aspergillus niger is the chief commercial source of the acid. It is
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Peel for the Production of Pection via Ammonium oxalate-Extraction” | BS Chemical Engineering | Añonuevo‚ Eula Mae Carla R. Fortuny‚ Emyl V. Falculan‚ Mae Florizel T. Leonen‚ Dianna Lyn T. INTRODUCTION RAW MATERIAL The Dwarf Cavendish banana (or simply Cavendish banana)‚ is a banana cultivar originally from Vietnam and China. It is one of the most commonly planted banana varieties from the Cavendish group‚ and is the leading fruit grown in the Philippines. Its prospect in the domestic
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colloidal. However‚ heating the solution causes it to coagulate and facilitates separating the precipitate from the solution. Potassium oxalate is added to the FeC2O4 precipitate‚ which produces a slightly basic solution for the oxidation of the ferrous ion to the ferric ion‚ by hydroxide‚ H2O2. The following reaction takes place: H2O + HO2- +2Fe2+ 2Fe3+ + 3OH- The OH- ion concentration of the solution is high enough so that some of the Fe3+ reacts with OH- to form ferric hydroxide(brown precipitate) as
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Bearded Dragon Nutrition Bearded dragon lizards are omnivorous‚ which means that they eat both animal and plant matter. As a rule of thumb‚ do not feed anything to your lizard that is bigger than the space between their eyes. If you feed them any food items that are bigger than that you could cause impaction or paralysis of the hind legs. When feeding baby and juveniles‚ feed them appropriate sized crickets two to three times daily. Offer them as many as they can eat within a five to ten minute
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CHEMICAL KINETICS RESULTS AND DISCUSSION The balanced equation of the reaction between sodium thiosulfate and Hydrochloric acid is: S2O32- (aq) + 2 H+ (aq) SO2 (g) + S (s) +H2O (l) Using beakers with the same diameter was very important in conducting the experiment. If different sizes were used‚ the visibility of the “x” on the paper beneath the beaker could disappear from view too early or too late than the hypothetical time depending on the depth of the solution. It was also significant
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