{"id":6048,"date":"2020-10-13T14:30:00","date_gmt":"2020-10-13T09:00:00","guid":{"rendered":"http:\/\/astan.lk\/al_virtualclassroom\/?p=6048"},"modified":"2020-10-13T14:31:05","modified_gmt":"2020-10-13T09:01:05","slug":"cells","status":"publish","type":"post","link":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/","title":{"rendered":"Cells"},"content":{"rendered":"

\u2022 The cell in which the cell reaction cannot be reversed by providing electrical energy is called a “primary cell’.<\/p>\n

eg-Daniel cell<\/p>\n

\"\"<\/a><\/p>\n

Electrolyte – NH4<\/sub>Cl\/ZnCl2<\/sub><\/p>\n

(+) Pole – C\/MnO2<\/sub><\/p>\n

(-) Pole –\u00a0Zn<\/p>\n

Reaction at (+) Pole(Cathode reaction) –\u00a0\u00a02NH4<\/sub>+<\/sup>(aq)+2MnO2<\/sub>(s)+2e\u00a0\u2192\u00a0Mn2<\/sub>O3<\/sub>(s) + H2<\/sub>O(l)+2NH3<\/sub>(aq)<\/p>\n

Reaction at (-) Pole(Anode reaction) –\u00a0Zn(s)\u00a0\u2192\u00a0Zn2+<\/sup>(aq) + 2e<\/p>\n

Cell reaction –\u00a02MnO2<\/sub>(s)+Zn(s)+H2<\/sub>O (l)\u00a0\u2192\u00a0Zn2+<\/sup>(aq) + Mn2<\/sub>O3<\/sub>(s) +2OH–<\/sup>(aq)<\/p>\n

 <\/p>\n

Leclanche cell<\/p>\n

<\/p>\n

Electrolyte -ZnSO4<\/sub>\/CuSO4<\/sub><\/p>\n

(+) Pole –\u00a0 Cu<\/p>\n

(-) Pole –\u00a0 Zn<\/p>\n

Reaction at (+) Pole(Cathode reaction) –\u00a0Cu2+<\/sup>(aq) + 2e \u2192\u00a0Cu(s)<\/p>\n

Reaction at (-) Pole(Anode reaction) –\u00a0Zn(s)\u00a0\u2192\u00a0Zn2+<\/sup>(aq) + 2e<\/p>\n

Cell reaction –\u00a0Zn(s) + Cu2+<\/sup>(aq)\u00a0\u2192\u00a0Zn2+<\/sup>(aq) + Cu(s)<\/p>\n

 <\/p>\n

\u2022 A cell in which the reactants can be regenerated from the products by charging after
\nits discharge is referred to as a ‘secondary cell’.<\/p>\n

eg. Lead accumulator<\/p>\n

<\/p>\n

Electrolyte –\u00a0dil. H2<\/sub>
\nSO4<\/sub><\/p>\n

Anode –\u00a0Pb<\/p>\n

Cathode –\u00a0PbO2<\/sub><\/p>\n

Anode reaction\u00a0during discharge –\u00a0Pb(s) + SO4<\/sub>2-<\/sup>(aq)\u00a0\u2192\u00a0PbSO4<\/sub>(s) + 2e<\/p>\n

Cathode reaction\u00a0during discharge –<\/p>\n

PbO2<\/sub>(s) + 4H+<\/sup>(aq) + SO4<\/sub>2-<\/sup>(aq) + 2e\u00a0\u2192\u00a0PbSO4<\/sub>(s) + 2H2<\/sub>O(l)<\/p>\n

Fuel cells<\/h4>\n

Electrochemcal cells in which reactants are continuously supplied from outside are referred as fuel cells. Dihydrogen and dioxygen, methane and dioxygen are commonly used for this purpose. One of the electrolyte used is concentrated KOH solution, maintained at 200 \u00b0C. Porous C-Ni electrodes are commonly used.<\/p>\n

\"\"<\/a><\/p>\n

Relevent reactions for the dihydrogen-dioxygen fuel cell are given below.<\/p>\n

Oxidation; 2H2<\/sub>(g) + 4OH–<\/sup>(aq) \u2192 4H2O(l) + 4e
\nReduction; O2<\/sub>(g) + 2H2<\/sub>O(aq) + 4e \u00a0\u2192 4OH–<\/sup>(aq)
\nCell reaction 2H2<\/sub>(g) + O2<\/sub>(g) \u2192\u00a02H2<\/sub>O(l)<\/sup><\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u2022 The cell in which the cell reaction cannot be reversed by providing electrical energy is called a “primary cell’. eg-Daniel cell Electrolyte – NH4Cl\/ZnCl2 (+) Pole – C\/MnO2 (-) Pole –\u00a0Zn Reaction at (+) Pole(Cathode reaction) –\u00a0\u00a02NH4+(aq)+2MnO2(s)+2e\u00a0\u2192\u00a0Mn2O3(s) + H2O(l)+2NH3(aq) Reaction at (-) Pole(Anode reaction) –\u00a0Zn(s)\u00a0\u2192\u00a0Zn2+(aq) + 2e Cell reaction –\u00a02MnO2(s)+Zn(s)+H2O (l)\u00a0\u2192\u00a0Zn2+(aq) + Mn2O3(s) +2OH–(aq) […]<\/p>\n","protected":false},"author":842,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[14,1678],"tags":[],"class_list":["post-6048","post","type-post","status-publish","format-standard","hentry","category-chemistry","category-unit-14"],"acf":[],"yoast_head":"\nCells - Learning & Education Portal<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cells - Learning & Education Portal\" \/>\n<meta property=\"og:description\" content=\"\u2022 The cell in which the cell reaction cannot be reversed by providing electrical energy is called a “primary cell’. eg-Daniel cell Electrolyte – NH4Cl\/ZnCl2 (+) Pole – C\/MnO2 (-) Pole –\u00a0Zn Reaction at (+) Pole(Cathode reaction) –\u00a0\u00a02NH4+(aq)+2MnO2(s)+2e\u00a0\u2192\u00a0Mn2O3(s) + H2O(l)+2NH3(aq) Reaction at (-) Pole(Anode reaction) –\u00a0Zn(s)\u00a0\u2192\u00a0Zn2+(aq) + 2e Cell reaction –\u00a02MnO2(s)+Zn(s)+H2O (l)\u00a0\u2192\u00a0Zn2+(aq) + Mn2O3(s) +2OH–(aq) […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\" \/>\n<meta property=\"og:site_name\" content=\"Learning & Education Portal\" \/>\n<meta property=\"article:published_time\" content=\"2020-10-13T09:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-10-13T09:01:05+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg\" \/>\n<meta name=\"author\" content=\"Admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\"},\"author\":{\"name\":\"Admin\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/ffb0504e2cfb71518790b2fffd668c59\"},\"headline\":\"Cells\",\"datePublished\":\"2020-10-13T09:00:00+00:00\",\"dateModified\":\"2020-10-13T09:01:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\"},\"wordCount\":285,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#organization\"},\"image\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg\",\"articleSection\":[\"Chemistry\",\"Unit 14\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\",\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\",\"name\":\"Cells - Learning & Education Portal\",\"isPartOf\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg\",\"datePublished\":\"2020-10-13T09:00:00+00:00\",\"dateModified\":\"2020-10-13T09:01:05+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage\",\"url\":\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg\",\"contentUrl\":\"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/astan.lk\/al_virtualclassroom\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cells\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#website\",\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/\",\"name\":\"Learning & Education Portal\",\"description\":\"Astan\",\"publisher\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/astan.lk\/al_virtualclassroom\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#organization\",\"name\":\"Learning & Education Portal\",\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/11\/logo.png\",\"contentUrl\":\"https:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/11\/logo.png\",\"width\":340,\"height\":51,\"caption\":\"Learning & Education Portal\"},\"image\":{\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/ffb0504e2cfb71518790b2fffd668c59\",\"name\":\"Admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/f76e3d5e4e7064c8c128567b8ab726a35a2d3ac22ff5a60d673f87b8d4ee7333?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/f76e3d5e4e7064c8c128567b8ab726a35a2d3ac22ff5a60d673f87b8d4ee7333?s=96&d=mm&r=g\",\"caption\":\"Admin\"},\"sameAs\":[\"http:\/\/lk.preceptor1\"],\"url\":\"https:\/\/astan.lk\/al_virtualclassroom\/author\/astan-preceptor1\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Cells - Learning & Education Portal","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:\/\/astan.lk\/al_virtualclassroom\/cells\/","og_locale":"en_US","og_type":"article","og_title":"Cells - Learning & Education Portal","og_description":"\u2022 The cell in which the cell reaction cannot be reversed by providing electrical energy is called a “primary cell’. eg-Daniel cell Electrolyte – NH4Cl\/ZnCl2 (+) Pole – C\/MnO2 (-) Pole –\u00a0Zn Reaction at (+) Pole(Cathode reaction) –\u00a0\u00a02NH4+(aq)+2MnO2(s)+2e\u00a0\u2192\u00a0Mn2O3(s) + H2O(l)+2NH3(aq) Reaction at (-) Pole(Anode reaction) –\u00a0Zn(s)\u00a0\u2192\u00a0Zn2+(aq) + 2e Cell reaction –\u00a02MnO2(s)+Zn(s)+H2O (l)\u00a0\u2192\u00a0Zn2+(aq) + Mn2O3(s) +2OH–(aq) […]","og_url":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/","og_site_name":"Learning & Education Portal","article_published_time":"2020-10-13T09:00:00+00:00","article_modified_time":"2020-10-13T09:01:05+00:00","og_image":[{"url":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg","type":"","width":"","height":""}],"author":"Admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Admin","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#article","isPartOf":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/"},"author":{"name":"Admin","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/ffb0504e2cfb71518790b2fffd668c59"},"headline":"Cells","datePublished":"2020-10-13T09:00:00+00:00","dateModified":"2020-10-13T09:01:05+00:00","mainEntityOfPage":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/"},"wordCount":285,"commentCount":0,"publisher":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/#organization"},"image":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage"},"thumbnailUrl":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg","articleSection":["Chemistry","Unit 14"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/astan.lk\/al_virtualclassroom\/cells\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/","url":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/","name":"Cells - Learning & Education Portal","isPartOf":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/#website"},"primaryImageOfPage":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage"},"image":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage"},"thumbnailUrl":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg","datePublished":"2020-10-13T09:00:00+00:00","dateModified":"2020-10-13T09:01:05+00:00","breadcrumb":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/astan.lk\/al_virtualclassroom\/cells\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#primaryimage","url":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg","contentUrl":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2017\/01\/download-5-1.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/astan.lk\/al_virtualclassroom\/cells\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/astan.lk\/al_virtualclassroom\/"},{"@type":"ListItem","position":2,"name":"Cells"}]},{"@type":"WebSite","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#website","url":"https:\/\/astan.lk\/al_virtualclassroom\/","name":"Learning & Education Portal","description":"Astan","publisher":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/astan.lk\/al_virtualclassroom\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#organization","name":"Learning & Education Portal","url":"https:\/\/astan.lk\/al_virtualclassroom\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/logo\/image\/","url":"https:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/11\/logo.png","contentUrl":"https:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/11\/logo.png","width":340,"height":51,"caption":"Learning & Education Portal"},"image":{"@id":"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/ffb0504e2cfb71518790b2fffd668c59","name":"Admin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/astan.lk\/al_virtualclassroom\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/f76e3d5e4e7064c8c128567b8ab726a35a2d3ac22ff5a60d673f87b8d4ee7333?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/f76e3d5e4e7064c8c128567b8ab726a35a2d3ac22ff5a60d673f87b8d4ee7333?s=96&d=mm&r=g","caption":"Admin"},"sameAs":["http:\/\/lk.preceptor1"],"url":"https:\/\/astan.lk\/al_virtualclassroom\/author\/astan-preceptor1\/"}]}},"_links":{"self":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/posts\/6048","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/users\/842"}],"replies":[{"embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/comments?post=6048"}],"version-history":[{"count":3,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/posts\/6048\/revisions"}],"predecessor-version":[{"id":10075,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/posts\/6048\/revisions\/10075"}],"wp:attachment":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/media?parent=6048"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/categories?post=6048"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/tags?post=6048"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}