Standardization of sodium hydroxide by ethanedioic acid solution Essay Example for Free

Standardization of sodium hydroxide by ethanedioic dosage resultant role EssayExperiments 1. Standardization of sodium hydroxide by ethanedioic acid solution 2. Determination of the submerging of commercial message colourless vinegar Standardization of sodium hydroxide by ethanedioic acid Objective To determine the thousand of sodium hydroxide. As the molarity of the sodium hydroxide is unknown, in order to standardize it, the concentration of the acid has to be known. Result Titration Trial 1 2 3 4 Initial burette reading() 18. 33 8. 05 7. 52 8. 21.Final burette reading() 45. 48 36. 25 35. 79 36. 82 Volume of sodium hydroxide solution used() 27. 15(rejected) 28. 20 28. 27 28. 61 Average volume of sodium hydroxide solution used() 28. 36 Treatment for result one thousand of the standard ethanedioic acid solution Mass of ethanedioic acid= 0. 8g Molar troop of ethanedioic acid= 2? (12+16+16+1) +2? (1+1+16) = 126 Number of groyne of ethanedioic acid= 6. 35? Molarity of the e thanedioic acid= = 0. 025M Molarity of the sodium hydroxide solution.Number of mole of 25. 0 ethanedioic acid= 6. 35 10 = 6. 35? Number of mole of sodium hydroxide = 6. 35 2 = 1. 27? Molarity of sodium hydroxide= 1. 27? = 0. 045M Determination of the concentration of commercial colourless vinegar Objective The concentration of ethanoic acid in different brands of vinegar would be determined. As the compositions of vinegar in different brands ar different, the highest concentration of ethanoic acid in the vinegar was said to be the best to buy.Result Titration Trial 1 2 3 4 Initial burette reading() 5. 99 9. 28 8. 50 7. 05 Final burette reading() 20. 32 26. 22 25. 17 23. 86 Volume of sodium hydroxide solution used() 14. 33(rejected) 16. 94 16. 67 16. 80 Average volume of sodium hydroxide solution used() 16. 81 Treatment for result * submersion of ethanoic acid in the commercial vinegar(ShanTou) Number of mole of sodium hydroxide = 0. 045? 0. 01681 = 7. 56? ?Number of mole of ethano ic acid = 7. 56?