{"id":548002,"date":"2023-04-23T18:55:58","date_gmt":"2023-04-23T13:25:58","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in-an-acidic-solution-h2o2aq3i%e2%88%92aq2haq%e2%86%92i3%e2%88%92aq2h2olthe-rate-of-formation-of-the-brown-coloured-tri-iodide-i\/"},"modified":"2025-06-19T20:33:45","modified_gmt":"2025-06-19T15:03:45","slug":"consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in-an-acidic-solution-h2o2aq3i%e2%88%92aq2haq%e2%86%92i3%e2%88%92aq2h2olthe-rate-of-formation-of-the-brown-coloured-tri-iodide-i","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/","title":{"rendered":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124","custom_permalink":"question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/"},"categories":[],"acf":{"question":"

Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.
H<\/mi>2<\/mn><\/msub>O<\/mi>2<\/mn><\/msub>(<\/mo>a<\/mi>q<\/mi>)<\/mo>+<\/mo>3<\/mn>I<\/mi>\u2212<\/mo><\/msup>(<\/mo>a<\/mi>q<\/mi>)<\/mo>+<\/mo>2<\/mn>H<\/mi>+<\/mo><\/msup>(<\/mo>a<\/mi>q<\/mi>)<\/mo>\u2192<\/mo>I<\/mi>3<\/mn>\u2212<\/mo><\/msubsup>(<\/mo>a<\/mi>q<\/mi>)<\/mo>+<\/mo>2<\/mn>H<\/mi>2<\/mn><\/msub>O<\/mi>(<\/mo>l<\/mi>)<\/mo><\/math>
The rate of formation of the brown-coloured tri-iodide ion \u0394<\/mi>I<\/mi>3<\/mn>\u2212<\/mo><\/msubsup><\/mfenced>\/<\/mo>\u0394<\/mi>t<\/mi><\/math>  can be
determined by measuring the rate of appearance of the colour. Following are initial
rate data at 25\u00b0C.<\/p>
Experiment<\/td>Initial H<\/mi>2<\/mn><\/msub>O<\/mi>2<\/mn><\/msub><\/mrow><\/mfenced><\/math><\/td>Initial I<\/mi>\u2212<\/mo><\/msup><\/mfenced><\/math><\/td>Initial rate of formation of I<\/mi>3<\/mn>\u2212<\/mo><\/msubsup>(<\/mo>M<\/mi>\/<\/mo>S<\/mi>)<\/mo><\/math><\/td><\/tr>
1<\/td>0.100<\/td>0.100<\/td>1.15<\/mn>\u00d7<\/mo>10<\/mn>\u2212<\/mo>4<\/mn><\/mrow><\/msup><\/math><\/td><\/tr>
2<\/td>0.100<\/td>0.200<\/td>2.30<\/mn>\u00d7<\/mo>10<\/mn>\u2212<\/mo>4<\/mn><\/mrow><\/msup><\/math><\/td><\/tr>
3<\/td>0.200<\/td>0.100<\/td>2.30<\/mn>\u00d7<\/mo>10<\/mn>\u2212<\/mo>4<\/mn><\/mrow><\/msup><\/math><\/td><\/tr>
4<\/td>0.200<\/td>0.200<\/td>4.60<\/mn>\u00d7<\/mo>10<\/mn>\u2212<\/mo>4<\/mn><\/mrow><\/msup><\/math><\/td><\/tr><\/tbody><\/table><\/figure>","options":null,"solution":"

The rate of formation of the brown-coloured tri-iodide ion ΔI3−\/Δt\\Delta \\text{I}_3^-\/\\Delta tΔI3−\/Δt can be determined by measuring the rate of appearance of the colour. Given the initial rate data at 25°C, we can analyze how the concentration of H2O2\\text{H}_2\\text{O}_2H2O2 and I−\\text{I}^-I− affect the rate.<\/p>\r\n

From the data:<\/p>\r\n

    \r\n
  1. Experiment 1: [H2O2]=0.100[ \\text{H}_2\\text{O}_2 ] = 0.100[H2O2]=0.100 M, [I−]=0.100[ \\text{I}^- ] = 0.100[I−]=0.100 M, Initial rate = 1.15×10−41.15 \\times 10^{-4}1.15×10−4 M\/s<\/li>\r\n
  2. Experiment 2: [H2O2]=0.100[ \\text{H}_2\\text{O}_2 ] = 0.100[H2O2]=0.100 M, [I−]=0.200[ \\text{I}^- ] = 0.200[I−]=0.200 M, Initial rate = 2.30×10−42.30 \\times 10^{-4}2.30×10−4 M\/s<\/li>\r\n
  3. Experiment 3: [H2O2]=0.200[ \\text{H}_2\\text{O}_2 ] = 0.200[H2O2]=0.200 M, [I−]=0.100[ \\text{I}^- ] = 0.100[I−]=0.100 M, Initial rate = 2.30×10−42.30 \\times 10^{-4}2.30×10−4 M\/s<\/li>\r\n
  4. Experiment 4: [H2O2]=0.200[ \\text{H}_2\\text{O}_2 ] = 0.200[H2O2]=0.200 M, [I−]=0.200[ \\text{I}^- ] = 0.200[I−]=0.200 M, Initial rate = 4.60×10−44.60 \\times 10^{-4}4.60×10−4 M\/s<\/li>\r\n<\/ol>\r\n

    From these experiments, it's observed that doubling the concentration of either H2O2\\text{H}_2\\text{O}_2H2O2 or I−\\text{I}^-I− doubles the initial rate of formation of I3−\\text{I}_3^-I3−. Therefore, the reaction is first order with respect to both H2O2\\text{H}_2\\text{O}_2H2O2 and I−\\text{I}^-I−.<\/p>","subject":"Chemistry"},"yoast_head":"\nConsider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124 - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124\" \/>\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\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124 - Infinity Learn by Sri Chaitanya\" \/>\n<meta property=\"og:description\" content=\"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124\" \/>\n<meta property=\"og:url\" content=\"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/\" \/>\n<meta property=\"og:site_name\" content=\"Infinity Learn by Sri Chaitanya\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-19T15:03:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/04\/infinitylearn.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1008\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@InfinityLearn_\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124 - Infinity Learn by Sri Chaitanya","description":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/","og_locale":"en_US","og_type":"article","og_title":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124 - Infinity Learn by Sri Chaitanya","og_description":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124","og_url":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/","og_site_name":"Infinity Learn by Sri Chaitanya","article_publisher":"https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","article_modified_time":"2025-06-19T15:03:45+00:00","og_image":[{"width":1920,"height":1008,"url":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/04\/infinitylearn.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_site":"@InfinityLearn_","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Organization","@id":"https:\/\/infinitylearn.com\/surge\/#organization","name":"Infinity Learn","url":"https:\/\/infinitylearn.com\/surge\/","sameAs":["https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","https:\/\/www.instagram.com\/infinitylearn_by_srichaitanya\/","https:\/\/www.linkedin.com\/company\/infinity-learn-by-sri-chaitanya\/","https:\/\/www.youtube.com\/c\/InfinityLearnEdu","https:\/\/twitter.com\/InfinityLearn_"],"logo":{"@type":"ImageObject","@id":"https:\/\/infinitylearn.com\/surge\/#logo","inLanguage":"en-US","url":"","contentUrl":"","caption":"Infinity Learn"},"image":{"@id":"https:\/\/infinitylearn.com\/surge\/#logo"}},{"@type":"WebSite","@id":"https:\/\/infinitylearn.com\/surge\/#website","url":"https:\/\/infinitylearn.com\/surge\/","name":"Infinity Learn by Sri Chaitanya","description":"Surge","publisher":{"@id":"https:\/\/infinitylearn.com\/surge\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/infinitylearn.com\/surge\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/#webpage","url":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/","name":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124 - Infinity Learn by Sri Chaitanya","isPartOf":{"@id":"https:\/\/infinitylearn.com\/surge\/#website"},"datePublished":"2023-04-23T13:25:58+00:00","dateModified":"2025-06-19T15:03:45+00:00","description":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124","breadcrumb":{"@id":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/consider-the-oxidation-of-iodide-ion-by-hydrogen-peroxide-in\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/infinitylearn.com\/surge\/"},{"@type":"ListItem","position":2,"name":"Consider the oxidation of iodide ion by hydrogen peroxide in an acidic solution.H2O2(aq)+3I\u2212(aq)+2H+(aq)\u2192I3\u2212(aq)+2H2O(l)The rate of formation of the brown-coloured tri-iodide ion\u00a0\u0394I3\u2212\/\u0394t\u00a0 can bedetermined by measuring the rate of appearance of the colour. Following are initialrate data at 25\u00b0C.ExperimentInitial\u00a0H2O2Initial\u00a0I\u2212Initial rate of formation of\u00a0I3\u2212(M\/S)10.1000.1001.15\u00d710\u2212420.1000.2002.30\u00d710\u2212430.2000.1002.30\u00d710\u2212440.2000.2004.60\u00d710\u22124"}]}]}},"_links":{"self":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/questions\/548002"}],"collection":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/questions"}],"about":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/types\/questions"}],"author":[{"embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/media?parent=548002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/categories?post=548002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}