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chemical formula of sodium thiosulfate: Na2S2O3 monoclinic white crystalline powder, certain gravity 1.667, soluble in water, insoluble in alcohol moncler outerwear sale , was heated in air decomposed into sodium oxide and sulfur dioxide. Burned in pure oxygen is generated sodium sulfate, sodium sulfide and sulfur.chlorine cure anhydrous drug analysis strategy name: sodium thiosulfate ?C Determination of sodium thiosulfate ?C Redox Titration Application: This strategy utilizes thio redox titration sodium content. This method is suitable for the determination of sodium thiosulfate. Principle of the strategy: Take the test quantity, dissolved in water, add starch indicator answer moncler down jackets store
, titration with iodine solution droplets were determined to continue the blue. Each 1mL iodine titration solution (0.05mol / L) is equivalent to 15.81mg of Na2S2O3. , That is too. Reagents: 1. Water (put the new boiling to room temperature) 2. Iodine titration solution (0.05mol / L) three. Sodium hydroxide remedy (1mol / L) 4. Methyl orange indicator answer five. Sulfuric acid titration solution (0.5mol / L) 6. bicarbonate 7 starch indicator solution 8 9 phenolphthalein indicator solution Methyl red ?C bromocresol green mixed indicator solution 10. trioxide benchmark 11 benchmark potassium hydrogen phthalate 12. sodium sulfate anhydrous base sodium Equipment: Sample preparation: 1. iodine titration remedy (0.05mol / L) preparation: Take iodine 13.0g, add 36g potassium iodide dissolved in 50mL of water, add three drops of hydrochloric acid and also the degree of water to create into a 1000mL cheap moncler clothing , shake with melting down glass filter filtration. Calibration: Take dried at 105 ?? to constant weight basis arsenic trioxide of about 0.15g, accurately weighed, add sodium hydroxide remedy (1mol / L) 10mL, micro-heat to dissolve, add water 20mL and 1 drop of methyl orange indicator answer, sulfuric acid titration solution (0.5mol / L) level of the yellow into pink, plus sodium bicarbonate 2g, water and starch indicator answer 50mL 2mL, using the droplets towards the remedy was light blue and purple. Every single 1mL iodine titration solution (0.05mol / L) is equivalent to four.946mg of arsenic trioxide. As per the fluid consumption along with the level of arsenic trioxide to take, calculate the concentration of the solution. (2) sodium hydroxide remedy (1mol / L) preparation: Take appropriate sum of sodium hydroxide, dissolve into a shaking water saturated answer, after cooling, house polyethylene plastic bottle, put it aside for several days to clarify the reserve. Saturated solution of sodium hydroxide to take clear 56mL, add cold water to create a brand new boiling over into 1000mL, shake. Calibration: Take dried at 105 ?? to constant weight basis of potassium hydrogen phthalate about 6g, accurately weighed, add boiling over a brand new cold water 50mL, shaking, to make an effort to dissolve, add 2 drops of phenolphthalein indicator answer, with the droplets, close to the finish line, should be created of potassium hydrogen phthalate is totally dissolved, the solution was titrated to a pink. Every 1mL sodium hydroxide answer (1mol / L) is equivalent to 204.2mg of potassium hydrogen phthalate. In line with the consumption of liquid potassium hydrogen phthalate along with the quantity taken, calculate the concentration of the remedy. Storage: house polyethylene plastic bottle moncler coats outlet , sealed; plug in two holes, each and every hole into a glass, a soda lime tube and connected to a suction of the liquid for use. three methyl orange methyl orange indicator answer to take 0