[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207970-en":3,"doc-seo-207970-105":30,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},207970,1099523882182,"Alex Sinclair","https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8",4,"Exam","Electrolysis - Answers","Practical electrolysis task investigating the electrolysis of copper(II) sulfate solution using copper electrodes that actively participate in the reactions. The method outlines connecting a power supply with positive and negative electrodes, then weighing copper strips, running electrolysis, and washing the strips with ethanol before drying and reweighing. Ionic half-equations are provided for both electrodes, followed by a question on how ethanol affects drying speed and a results discussion using a table.","􀀒 Most experiments involving electrolysis use inert electrodes, which do not take part in thereactions. However, in some experiments the electrodes do take part in the reactions.  \nA student investigates the electrolysis of copper(II) sulfate solution using copper electrodes which do take part in the reaction. She uses this apparatus.  \npower supply  \n+  \n–  \nlamp  \npositive electrode   \nnegative electrode  \n copper(II) sulfate solution  \nShe uses this method.  \nt weigh two clean strips of copper  \nt use one strip as the positive electrode and the other as the negative electrode t after electrolysis wash the strips of copper with ethanol (a liquid that boils at 78 °C) t dry the strips of copper and reweigh them  \nThe ionic half-equations for the reactions at the electrodes are Positive electrode Cu(s) – 2e– → Cu2+(aq)  \nNegative electrode Cu2+(aq) + 2e– → Cu(s)  \n(a) Suggest why the copper strips would dry more quickly when washed with ethanol rather than with water.  \n(1)  \n[E](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[t](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[han](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[ol](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.. ...](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[eva](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[p](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[......](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[or](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[a](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[tes](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[...](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[at](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[...](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[a](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.. .](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[l](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.. .](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[o](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[we](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[.](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..wat.er)[r](E.t.han.ol.. ...eva.p......or.a.tes...at...a.. .l.. .o.we.r...tem.p......er.a.ture.. th.an..","cbCaiqX25R4Rx046","https://ap.wps.com/l/cbCaiqX25R4Rx046","pdf",2480312,1,9,"English","en",105,"# Electrolysis of copper(II) sulfate\n## Apparatus and method\n## Ionic half-equations at electrodes\n## (a) Ethanol wash: drying rate explanation\n## (b) Results table","[{\"question\":\"Why does the experiment use copper electrodes instead of inert electrodes?\",\"answer\":\"In this investigation, the copper electrodes take part in the reactions, unlike inert electrodes that do not participate.\"},{\"question\":\"What are the ionic half-equations for the electrodes in this experiment?\",\"answer\":\"Positive electrode: Cu(s) - 2e- → Cu2+(aq). Negative electrode: Cu2+(aq) + 2e- → Cu(s).\"},{\"question\":\"How does washing with ethanol affect the drying of the copper strips compared with water?\",\"answer\":\"Ethanol helps the strips dry more quickly than water, because ethanol boils at a lower temperature than water.\"}]","Electrolysis - Answers | PDF",1788601938,23,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":28},"electrolysis-answers","",{"@graph":36,"@context":85},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/electrolysis-answers/207970/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-06","2026-09-05",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"Why does the experiment use copper electrodes instead of inert electrodes?","Question",{"text":75,"@type":76},"In this investigation, the copper electrodes take part in the reactions, unlike inert electrodes that do not participate.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"What are the ionic half-equations for the electrodes in this experiment?",{"text":80,"@type":76},"Positive electrode: Cu(s) - 2e- → Cu2+(aq). Negative electrode: Cu2+(aq) + 2e- → Cu(s).",{"name":82,"@type":73,"acceptedAnswer":83},"How does washing with ethanol affect the drying of the copper strips compared with water?",{"text":84,"@type":76},"Ethanol helps the strips dry more quickly than water, because ethanol boils at a lower temperature than water.","https://schema.org",{"og:url":52,"og:type":87,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":89,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":92},[93,97,101,104,109,114,119,124,128,131,135],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":94,"show_sort_weight":95,"slug":96},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":98,"show_sort_weight":99,"slug":100},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":102,"slug":103},70,"exam",{"id":105,"doc_module":4,"doc_module_name":46,"category_name":106,"show_sort_weight":107,"slug":108},5,"Comic",60,"comic",{"id":110,"doc_module":4,"doc_module_name":46,"category_name":111,"show_sort_weight":112,"slug":113},6,"Technology",50,"technology",{"id":115,"doc_module":4,"doc_module_name":46,"category_name":116,"show_sort_weight":117,"slug":118},7,"Healthcare",40,"healthcare",{"id":120,"doc_module":4,"doc_module_name":46,"category_name":121,"show_sort_weight":122,"slug":123},8,"Research & Report",30,"research-report",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":125,"show_sort_weight":126,"slug":127},"Religion & Spirituality",20,"religion-spirituality",{"id":126,"doc_module":4,"doc_module_name":46,"category_name":129,"show_sort_weight":126,"slug":130},"World Cup","world-cup",{"id":132,"doc_module":4,"doc_module_name":46,"category_name":133,"show_sort_weight":132,"slug":134},10,"Lifestyle","lifestyle",{"id":136,"doc_module":4,"doc_module_name":46,"category_name":137,"show_sort_weight":105,"slug":138},19,"General","general"]