{"id":89421,"date":"2022-02-14T19:54:07","date_gmt":"2022-02-14T14:24:07","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=89421"},"modified":"2022-02-14T19:54:07","modified_gmt":"2022-02-14T14:24:07","slug":"to-study-the-reaction-rate-of-reaction-of-iodide-ions-with-hydrogen-peroxide-at-different-concentrations-of-iodide-ions","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/chemistry\/to-study-the-reaction-rate-of-reaction-of-iodide-ions-with-hydrogen-peroxide-at-different-concentrations-of-iodide-ions\/","title":{"rendered":"To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions"},"content":{"rendered":"

To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions<\/strong><\/span><\/h2>\n

Theory<\/strong><\/span>
\nHydrogen peroxide oxidizes iodide ions to iodine in acidic medium
\nH2<\/sub>O2<\/sub> + 2I\u2013<\/sup> + 2H+<\/sup> \u2014\u2013> 2H2<\/sub>0 + I2<\/sub>
\nThe reaction is monitored by adding a known volume of sodium thiosulphate solution and starch solution to the reaction mixture. Iodine liberated at once reacts with sodium
\nthiosulphate solution and is reduced to iodide ions
\nI2<\/sub>+ 2S2<\/sub>O3<\/sub>2-<\/sup> \u2014fast\u2014> S8<\/sub>O6<\/sub>2-<\/sup> + 2I\u2013<\/sup>
\nWhen thiosulphate ions are completely consumed, the liberated iodine reacts with starch solution and gives blue colour
\nI2<\/sub> + Starch \u2014\u2014-> Blue complex
\nThe time elapsed before the appearance of blue colour, gives an idea about the rate of the reaction.<\/p>\n

Apparatus and Chemicals<\/strong><\/span>
\n4 Conical flasks (250 ml), measuring cylinder, burette, pipette (25 ml), stop-watch, 0.1 M KI t solution, 2.5 M H2<\/sub>S04<\/sub>, starch solution. \u20183%\u2019 H2<\/sub>02<\/sub> solution, 0.05 M sodium thiosulphate solution.<\/p>\n

Procedure<\/strong><\/span><\/p>\n

    \n
  1. Take four 250 ml conical flasks and label them as A, B, C and D.<\/li>\n
  2. Add 10 ml, 20 ml, 40 ml and 60 ml of 0.1 M KI solution to the flasks A, B, C and D respectively.<\/li>\n
  3. Add 10 ml of to each flask.<\/li>\n
  4. Add water to make the volume of solution 100 ml in each flask.<\/li>\n
  5. Add 5 ml starch solution to each flask.<\/li>\n
  6. Add 10 ml of 0.05 M sodium thiosulphate solution to each flask.<\/li>\n
  7. Add 5 ml of 3% hydrogen peroxide solution to flask A with the help of a pipette and start the stop watch immediately. Stir the mixture and watch for the blue colour to appear. Note the time when the blue colour just appears.<\/li>\n
  8. Repeat the step 7 with the solutions in flasks B, C and D.<\/li>\n<\/ol>\n

    Observations<\/strong><\/span>
    \n\"to-study-the-reaction-rate-of-reaction-of-iodide-ions-with-hydrogen-peroxide-at-different-concentrations-of-iodide-ions-1\"
    \nTime required for the blue colour to first appear in :
    \nFlask A \u2014 \u2026\u2026\u2026..s
    \nFlask B \u2014 \u2026\u2026\u2026.s
    \nFlask C \u2014 \u2026\u2026\u2026.s
    \nFlask D \u2014 \u2026\u2026\u2026.s<\/p>\n

    Conclusion<\/strong><\/span>
    \nThe rate of the reaction increases with increase in concentration of iodide ions.<\/p>\n

    Precautions<\/strong><\/span><\/p>\n

      \n
    1. Always use a freshly prepared solution of sodium thiosulphate.<\/li>\n
    2. Concentration of KI solution should be higher than the concentration of sodium thiosulphate solution.<\/li>\n
    3. Use freshly prepared starch solution.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

      To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions Theory […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Get To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions on Infinity Learn.","custom_permalink":"study-material\/cbse\/chemistry\/to-study-the-reaction-rate-of-reaction-of-iodide-ions-with-hydrogen-peroxide-at-different-concentrations-of-iodide-ions\/"},"categories":[92,21],"tags":[],"table_tags":[],"acf":[],"yoast_head":"\nTo Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Get To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions on Infinity Learn.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/chemistry\/to-study-the-reaction-rate-of-reaction-of-iodide-ions-with-hydrogen-peroxide-at-different-concentrations-of-iodide-ions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"To Study the Reaction Rate of Reaction of Iodide Ions with Hydrogen Peroxide at Different Concentrations of Iodide Ions - 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