{"id":8796,"date":"2018-02-27T21:15:42","date_gmt":"2018-02-27T20:15:42","guid":{"rendered":"http:\/\/serveiseducatius.xtec.cat\/tarragones\/?p=8796"},"modified":"2019-04-29T11:00:55","modified_gmt":"2019-04-29T09:00:55","slug":"trics12_isabate","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/tarragones\/dinamitzacio\/trics\/trics12_isabate\/","title":{"rendered":"El coure en les monedes"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-5353\" title=\"Irene Sabat\u00e9 Diez\" src=\"http:\/\/serveiseducatius.xtec.cat\/tarragones\/wp-content\/uploads\/usu549\/2018\/02\/trics12_isabate.jpg\" alt=\"Irene Sabat\u00e9 Diez\" width=\"150\" height=\"200\" \/><strong><span style=\"color: #808080;\"><em>T\u00edtol:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/em><\/span><\/strong><strong>El coure en les monedes<\/strong><br \/>\n<strong><em><span style=\"color: #808080;\">Autor\/a:\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong><strong> Irene Sabat\u00e9 Diez<\/strong><br \/>\n<strong><em><span style=\"color: #808080;\">Tutor\/a:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Cinta Sebasti\u00e0<br \/>\n<strong><em><span style=\"color: #808080;\">Modalitat:\u00a0\u00a0<\/span><\/em><\/strong>Ci\u00e8ncies i tecnologia: Cientificot\u00e8cnic<br \/>\n<strong><em><span style=\"color: #808080;\">\u00c0rea:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Qu\u00edmica<br \/>\n<strong><em><span style=\"color: #808080;\">Centre:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/em><\/strong>C Sant Pau Ap\u00f2stol<br \/>\n<strong><em><span style=\"color: #808080;\">Localitat:\u00a0\u00a0\u00a0<\/span><\/em><\/strong>Tarragona<\/p>\n<h6><strong>Objectius:<\/strong><\/h6>\n<ol>\n<li>\n<p style=\"text-align: justify;\">Investigar sobre els aliatges i en concret sobre els que s\u2019empren per fabricar<br \/>\nmonedes.<\/p>\n<\/li>\n<li>\n<p style=\"text-align: justify;\">Aprofundir en el coneixement del disseny i fabricaci\u00f3 de les monedes aix\u00ed com de les seves caracter\u00edstiques.<\/p>\n<\/li>\n<li>\n<p style=\"text-align: justify;\">Estudiar les reaccions qu\u00edmiques entre l\u2019\u00e0cid ac\u00e8tic i l\u2019\u00e0cid n\u00edtric amb els metalls que composen els aliatges de les monedes.<\/p>\n<\/li>\n<li>\n<p style=\"text-align: justify;\">Investigar t\u00e8cniques d\u2019identificaci\u00f3 i quantificaci\u00f3 del coure de les monedes:<br \/>\nFluoresc\u00e8ncia de raigs X i volumetria redox amb una dissoluci\u00f3 de tiosulfat de sodi.<\/p>\n<\/li>\n<li>\n<p style=\"text-align: justify;\">Aplicar les t\u00e8cniques anteriors a monedes en curs i realitzar un estudi comparatiu dels resultats.<\/p>\n<\/li>\n<\/ol>\n<h6><strong>El proc\u00e9s:<\/strong><\/h6>\n<p style=\"text-align: justify;\">Primer de tot volem saber m\u00e9s sobre les monedes: l&#8217;origen, el proc\u00e9s de fabricaci\u00f3, els components de cadascuna, els aliatges que les formen, etc. Per\u00f2 \u00e9s un treball m\u00e9s pr\u00e0ctic on els resultats finals obtinguts s\u00f3n l&#8217;objectiu principal. \u00c9s per aix\u00f2 que els errors per precisi\u00f3 faran canviar molt els resultats. En el proc\u00e9s fet al laboratori, s&#8217;han de tenir molts factors en compte que es veuen reflectits al final del treball quan es comparen aquests resultats amb els de la espectrometria. I precisament les nostres dificultats van ser a l&#8217;hora d&#8217;intentar controlar aquests factors com s\u00f3n per exemple que hi hagi un medi massa \u00e0cid que fa que el iode s\u2019oxidi, i aix\u00f2 provoca la determinaci\u00f3 de menys coure del que realment hi ha en la moneda, o que la moneda contingui altres metalls que puguin reaccionar amb l&#8217;\u00e0cid n\u00edtric i per tant tenir un percentatge m\u00e9s elevat de coure del real.<br \/>\nDespr\u00e9s de fer les dues pr\u00e0ctiques, toca comparar els resultats. per fer-ho vam considerar els obtinguts amb els raigs X com els reals, ja que hi ha menys marge d&#8217;error per precisi\u00f3. D&#8217;aquesta manera s&#8217;obt\u00e9 la difer\u00e8ncia en tant per cent de la iodometria respecte l&#8217;altre.<\/p>\n<h6><strong>Conclusions:<\/strong><\/h6>\n<p style=\"text-align: justify;\">Despr\u00e9s de realitzar tota la investigaci\u00f3 te\u00f2rica i aplicar-la a la part pr\u00e0ctica, s\u2019ha pogut comprovar que la majoria dels aliatges de les monedes contenen el coure com a element principal. A m\u00e9s hem ent\u00e8s el per qu\u00e8 d\u2019utilitzar el vinagre, el poder que t\u00e9 per eliminar els \u00f2xids creats per l\u2019aire al seu damunt, i posteriorment com l\u2019\u00e0cid n\u00edtric \u00e9s una subst\u00e0ncia id\u00f2nia per dissoldre la moneda. Entrant en les t\u00e8cniques, es pot dir que l\u2019espectrometria feta per raigs X, ens d\u00f3na uns resultats prou fiables tot i nom\u00e9s obtenir resultats de la capa superficial de la moneda, i en canvi amb la iodometria es poden produir m\u00e9s errors experimentals. Al acabar, podem comprovar que fent la comparaci\u00f3 entre les dues t\u00e8cniques, apareix una difer\u00e8ncia mitjana del 20,19% de la iodometria sobre els raigs X, de la qual es poden trobar algunes de les causes que poden fer augmentar aquesta.<\/p>\n<h6><strong>Bibliografia:<\/strong><\/h6>\n<ul>\n<li>Francesc Andreu, N\u00faria Riba, Pere CastellsQu\u00edmica: 1 BatxilleratMcgraw hill<\/li>\n<li>Francesc Andreu, N\u00faria Riba, Pere CastellsQu\u00edmica: 2 BatxilleratMcgraw hill<\/li>\n<li>Francisco BermejoQu\u00edmica anal\u00edtica general, cuantitativa e instrumental: Volumen 1Paraninfo<\/li>\n<li>Francisco BermejoQu\u00edmica anal\u00edtica general, cuantitativa e instrumental: Volumen 2Paraninfo<\/li>\n<li>Z.G. Vas\u00edlieva, A.A. Gran\u00f3vskaia, A.A. T\u00e1perovaTrabajos de laboratorio de qu\u00edmica: General e Inorg\u00e1nicaMir Mosc\u00fa<\/li>\n<\/ul>\n<h6><strong>Llocs Web:<\/strong><\/h6>\n<ul>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=FmqvHlmFW5E\" target=\"_blank\" rel=\"noopener noreferrer\">As\u00ed lo fabrican. C\u00f3mo se hace el dinero. Monedas (Euro)<\/a><\/li>\n<li><a href=\"http:\/\/www.curiosfera.com\/historia-del-dinero-monedas-billetes\/\" target=\"_blank\" rel=\"noopener noreferrer\">Curiosfera. Historia del dinero, monedas y billetes<\/a><\/li>\n<li><a href=\"http:\/\/definicion.de\/rayos-x\/\" target=\"_blank\" rel=\"noopener noreferrer\">Definici\u00f3n.de. Definici\u00f3n de rayos X<\/a><\/li>\n<li><a href=\"http:\/\/elementos.org.es\/cobre\" target=\"_blank\" rel=\"noopener noreferrer\">Elementos. Cobre<\/a><\/li>\n<li><a href=\"https:\/\/molesdequimica.wordpress.com\/2013\/10\/31\/de-que-estan-hechas-las-monedas\/comment-page-1\/\" target=\"_blank\" rel=\"noopener noreferrer\">Moles de qu\u00edmica. \u00bfDe qu\u00e9 est\u00e1n hechas las monedas?<\/a><\/li>\n<li><a href=\"http:\/\/www.monografias.com\/trabajos105\/yodometria-quimica-analitica\/yodometria-quimica-analitica.shtml#ixzz4uSjeWA35\" target=\"_blank\" rel=\"noopener noreferrer\">Monografias. Yodometr\u00eda (qu\u00edmica anal\u00edtica)<\/a><\/li>\n<li><a href=\"http:\/\/queaprendemoshoy.com\/cual-es-el-origen-de-la-moneda\/\" target=\"_blank\" rel=\"noopener noreferrer\">Queaprendemoshoy. \u00bfCu\u00e1l es el origen de la moneda?<\/a><\/li>\n<li><a href=\"https:\/\/www.scribd.com\/doc\/97314646\/El-COBRE-Y-LAS-REACCIONES-QUIMICAS7\" target=\"_blank\" rel=\"noopener noreferrer\">Scribd. El cobre y las reacciones qu\u00edmicas<\/a><\/li>\n<li><a href=\"http:\/\/www.tipos.co\/tipos-de-aleaciones\/#ixzz4uS2iiFFs\" target=\"_blank\" rel=\"noopener noreferrer\">Tipos. Tipos de aleaciones<\/a><\/li>\n<\/ul>\n<h6><strong>Presentaci\u00f3:<\/strong><\/h6>\n<p><iframe loading=\"lazy\" style=\"border: 1px solid #CCC; border-width: 1px; margin-bottom: 5px; max-width: 100%;\" src=\"\/\/www.slideshare.net\/slideshow\/embed_code\/key\/Ka3lONgbzAGFc3\" width=\"595\" height=\"485\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"> <\/iframe><\/p>\n<div style=\"margin-bottom: 5px;\"><strong> <a title=\"El coure en les monedes\" href=\"\/\/www.slideshare.net\/crptarragones\/el-coure-en-les-monedes\" target=\"_blank\" rel=\"noopener noreferrer\">El coure en les monedes<\/a> <\/strong> from <strong><a href=\"https:\/\/www.slideshare.net\/crptarragones\" target=\"_blank\" rel=\"noopener noreferrer\">CRP del Tarragon\u00e8s<\/a><\/strong><\/div>\n<h6><strong>Fotos:<\/strong><\/h6>\n<div id=\"2980F\" style=\"width: 600px; height: 400px; display: none;\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/dEAu9xM4PT9AHdN5pmbRobnzvLfFr5eOTxJ97z_YdGoa9clpJ2fiTRIsnY7e_9e1uqCXDvnfKBPjtfedsKOaUh-VHxr6Wog74NUwpdjkfulgk5dNQHzzsjLdyJuOjzUoMZsgLfaIX-6MDkYqcRB4t5NX7VQ2fQqMI3I3Q-ESvwji7GFh3CyRhXUo4rQJ1PFm1j_Hi4rRaSFYEBTSyk4COqQzapv5h6u-fGZ-9SRvDFllkwuU39Ydq7ggrXEe5Q6k1YA9CGct7fa6GzqFymzms30WjlcDauT86qtrVR3nRP8KUfEFZw8Gcj04UiIAa6LPu4cfx_C6RJWyXQfItgHKoqpdS-YyIJpu5VlYplVZCF9NfDtCMw_kSvGLdwxhNi1S46pLDpn2gybvAiuRdhLSwwN8zpzhmP0WOVcFntihWdj7D8G9rVlITnxIr_aKwXkeGN3P2PKlh8zTARyBFGlOZBRxaaR8oANVcHWZPFL5J4u6m5pgbBRvk-8K6fLlSEQMy6ZzIn1uev-hzBXVrWprvGyHwRqPHuVdC7N_svNBI1Mm8FOOldVfxObpuBUZUAz7-w7z2p6MjDvtk05oijgiMkYjsBED54LRsU7n5FY-BnFBO8o--s2M5SU_51Uf7U1iX7Vt4HyZqw9QOkZXa25DepSkn_6kDt4Y=w1664-h936-no\" data-link=\"https:\/\/photos.google.com\/share\/AF1QipNSuBRRMYSMGbS0CbdjR5oHZMJ2P3uhmBtZxcp1Bki25clAyQ-CeEq1zvqr1MctnA\/photo\/AF1QipPM1J-b3f1ig4AEDsPdk0oogb_TQ7tEBzClz5jB?key=ZnY5RzJwQWd6VjIyWHM1YVJkMXhIejMwN2RoeF9R\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/unPF9MY8MP6yNYIC8HirKKgTub7gtIj-U9XZXzMWYlgy2cxpHQwxacEcZgz8JzmLCEcFXuG2FUhaXQuARCe5ZC92mf_0GfQ_pXLH_oBx2b2F8r5jx9fTTHlxvMBDr5xtIPklmbtd_VddYzAiLjwy1RuerGmj-M0KPY__Tnb2FctEgr4QyaxMkUEBsL2EwlHljjKln_0CfHpiFqxCbTynAAlQU7w1lmzTZuinG078QHrDz-7IlBw2jMrpJB6EVC9NuMF4H4Ze2q-lU0MKQWFV5Lw_18cRdvUk-HrLEI73pDzWsboBKeAwjobBKdwladgBaOOicwzBz0weNwFkgpz8Y0JYECUt6_cSNNkLVQZEOC9JVfapgpb0cAfXoYJZCui-cYS155bNlRkbzISL9InYiyhQGRDGU6FHqyo3EqhfoqYU79mgTD9mAAUrEM7ncinXyPsSTO-h-rfBl92ZXN3kxtHzyC113LyCwSkW0Bbq1fZ1tOBVjQsOz_TaYr0FpSKB7ISLpQCHqvLvuTuq8UiVegCu80dRPX9sKYbi9rA_IGIKhn3ZkbxgBMvQ1VSzbzuJCsxPAyBmP38a1zO5IyW9MoSJKHEjkmML7riyIMPFThM7lgECNnOP4CR_uithaSXDYxM_gGYnNacXh9c4k9jq6v_Ze2PXDtWv=w1664-h936-no\" data-link=\"https:\/\/photos.google.com\/share\/AF1QipNSuBRRMYSMGbS0CbdjR5oHZMJ2P3uhmBtZxcp1Bki25clAyQ-CeEq1zvqr1MctnA\/photo\/AF1QipPbXQFVL6-LE65FqkwSNha42sV7RzxGGJCk2uN5?key=ZnY5RzJwQWd6VjIyWHM1YVJkMXhIejMwN2RoeF9R\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/zUiYsl7yWsp-7lIw-Krb8fu0hkOQPf9wxzndwmpHapsmTfqGpG_uS5g7TwhJsXShUyYto1jHTe6tBfCdHPPw3p1kjgTCtRWR9cQxdwmCASTr0GI-d94ZrzE-7WaghfdxHjJ2ac2Do75o-05hIvMVEteUIxuYK1IVeCVwLUsVwYdmCjqxTPofLr3qHCpjIj45RSy26S6LSoYB1qK1bHKHKw-C6-3ldUGpDDzU6v81fZ1HTnBpSz9-Ju4ALw-CRtre1AL1_c5EybFFiqqRD1EYIoTnirHyqz5fiel9hLlYRkN1JLj9_tbhyH0AG-G9cGy3gzqCSxXpq9ZDN2cETlT6jBfMsWdcJrc_eMbIe_HY0qQGapNxWhlBeqRoBSMljCiZ2t7Z1SPSVe_Ezx8syV_TZxoeFpfQfdIXYYqhUeMpfAPjas2ZjucOADDfy90fs2mb0aj9KH395W47tZYaIMVXg1bThXTykOxMIWWN9XDyx67QE2NdZO7xc7y4xA9-9MFIhueVtvxEdnKAA7aEJ85Gmvq7o6N6OG7a94U6rCaJI2YcPclEYhTWBnfjFkIteUW0lCeahrsiAoh4SKk9Y1K762owhZvo0r0jtueJf55gMmeOi3d33w0TuZ9RrxM_AOy8BMkjrkEM6n_QwCFaHbhdKgRY9-cz-a2N=w1666-h936-no\" data-link=\"https:\/\/photos.google.com\/share\/AF1QipNSuBRRMYSMGbS0CbdjR5oHZMJ2P3uhmBtZxcp1Bki25clAyQ-CeEq1zvqr1MctnA\/photo\/AF1QipMyoWt1xod6TSN7xQ7VqQF-cqNc8T_AT-ed4rVr?key=ZnY5RzJwQWd6VjIyWHM1YVJkMXhIejMwN2RoeF9R\" \/><br \/>\n<img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/R4rpbM9iGWIrtq5Dz78t5phGGbuSsE6JOBbhOm9Ua3zlGjdEtpv5d8TAGmGV8hv6iqTw66_UzMLCimPWZU1vBlxV-5IQW1HNyKWbDG8V9WVrW7FrfJKL4i8Sm8FJb5CbZg785IAxyr3VFjQi_zcgXGtSwcZ9Al8ycGPl87Sm0ycD36F5szRI3mSFoBDnZ0RpwSUKTCGR9AoOV1TrSdg2x1BRyQhFgBLtSz7pOSYtxry5iL_icRpqg_gWCmKtJ6dG8z1sJlevgYcBdmyGSqB1hvOMBj9r9E4phlyYo8d4XQqcmT-UzgaVZyQsLKQBl28gXoRz9tMU8qPp9yRxx-FSQe81VtmhfgX-lJyWMsCGFwYWY2km42l5vTZWZ4lkamyJ-U_pwI43ThkOAH7_GlgEVvAYYAro2OZM6voJut3YnHaB5TADGXAwNluFYh1PPKxJyOyZRo64A-NPrFBaJGoOPrUd0uZOLevAv-5o9zP2uPc75mQMmLhEh_lJgoBU2iYZno9KnP_VpG4nTzzCuGLJ21WeOF5uH2U-PZcZRnb6VjIcQ31xjujTivzPFI1KHkvuu8D1kcEgbMN7wQXlAld18R0yAqhG1oGhvdJDcfFpkiG7M7pr2YhVjGGLE9h6d8RCH1_4bC_w9CtV0h2I0jCVm08YR2DEkpVn=w688-h936-no\" data-link=\"https:\/\/photos.google.com\/share\/AF1QipNSuBRRMYSMGbS0CbdjR5oHZMJ2P3uhmBtZxcp1Bki25clAyQ-CeEq1zvqr1MctnA\/photo\/AF1QipPk3tu4aaeqIyFzESTBP9VzX5ULI9yDkJaw8hi5?key=ZnY5RzJwQWd6VjIyWHM1YVJkMXhIejMwN2RoeF9R\" \/><\/div>\n<p><script type=\"text\/javascript\" src=\"https:\/\/cdn.jsdelivr.net\/jquery\/1.12.3\/jquery.min.js\"><\/script><br \/>\n<script>\n (MyGalleries=(typeof MyGalleries === 'undefined' ? [] : MyGalleries)).push({gallId:'#2980F',autoplay:true,lightbox:true,debug:false,popupLinks:true});\n if(typeof GalleryLoaded === 'undefined'){\n  GalleryLoaded = jQuery(function(){\n   jQuery.ajax({url:'https:\/\/cdn.jsdelivr.net\/galleria\/1.4.2\/galleria.min.js',dataType:'script',cache:true}).done(function(){\n    Galleria.loadTheme('https:\/\/cdn.jsdelivr.net\/galleria\/1.4.2\/themes\/classic\/galleria.classic.js');\n    for(var n in MyGalleries){\n     Galleria.run(MyGalleries[n].gallId, MyGalleries[n]);\n     jQuery(MyGalleries[n].gallId).css('display','block');\n    }\n   });\n  });\n }\n<\/script><br \/>\n<sup><em>Foto 1.- Reacci\u00f3 de la moneda amb l&#8217;\u00e0cid n\u00edtric<\/em><\/sup><br \/>\n<sup><em> Foto 2.- Comparaci\u00f3 entre el color resultant al afegir l&#8217;\u00e0cid n\u00edtric en cada moneda. <\/em><\/sup><br \/>\n<sup><em> Foto 3.- Dissoluci\u00f3 abans i despr\u00e9s de fer la valoraci\u00f3 amb el tiosulfat<\/em><\/sup><br \/>\n<sup><em> Foto 4.- Gr\u00e0fic obtingut durant la espectrometria de raigs X amb el qual es veu la quantitat que cont\u00e9 de cada element la moneda<\/em><\/sup><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Irene Sabat\u00e9 Diez<\/p>\n","protected":false},"author":1,"featured_media":8906,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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