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The preface explains the purpose of easing preparation for students and mentors using high-school chemistry foundations plus six advanced theoretical topics and two advanced practical topics. It defines Fields of Advanced Difficulty across thermodynamics, kinetics, electrochemistry, inorganic complexes, stereochemistry, and DNA/RNA. Notes clarify that some listed topics will not appear in the exam set and give general evaluation rules.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/preparatory-problems-from-the-50th-icho-series-4-preparatory-problems/401199/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/preparatory-problems-from-the-50th-icho-series-4-preparatory-problems/401199.png","ImageObject",300,407,{"name":92,"@type":93},"404brain","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-08","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is the purpose of these Preparatory Problems for the 50th IChO?","Question",{"text":113,"@type":114},"They are intended to make preparation for the Olympiad easier for both students and their mentors by covering a wide range of challenging modern chemistry topics.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Which areas are included under Fields of Advanced Difficulty for the theoretical problems?",{"text":118,"@type":114},"Thermodynamics, kinetics, electrochemistry, inorganic complexes, stereochemistry, and DNA and RNA topics are listed as advanced fields.",{"name":120,"@type":111,"acceptedAnswer":121},"Are all topics mentioned in the preparatory problems expected to appear in the exam set?",{"text":122,"@type":114},"No. The notes state that students are not expected to get advanced training in several listed topics because they WILL NOT appear in the exam set.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},401199,1790554810,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":146,"preview_page_count":4},1099529839291,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","50 th  \nPREPARATORY PROBLEMS  \nEdited by Anton Sirota  \n28 theoretical problems  \n8 practical problems  \n2018  \nTHE PREPARATORY PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS, Series 4  \nTHE PREPARATORY PROBLEMS FROM THE 50th IChO  \nEdited by Anton Sirota  \nIChO International Information Centre, Bratislava, Slovakia  \nISBN 978-80-8072-174-9  \nCopyright © 2019 by IUVENTA  \nIssued by IUVENTA in 2020  \nwith the financial support of the Ministry of Education of the Slovak Republic  \nNumber of copies: 200 Not for sale.  \nYou are free to copy, distribute, transmit or adapt this publication or its parts for unlimited teaching purposes, however, as it is usual and required in the chemical literature , you are obliged to attribute your copies, transmissions in internet or adaptations with a reference to:  \n\"The Preparatory Problems from the International Chemistry Olympiads, Series 4, The Preparatory Problems from the 50th IChO, editor Anton Sirota, IIC IChO, Iuventa, Bratislava, 2020”.  \nThe above conditions can be waived if you get permission from the copyright holder.  \nIssued by IUVENTA in 2020  \nwith the financial support of the Ministry of Education of the Slovak Republic Number of copies: 200  \nNot for sale.  \nInternational Chemistry Olympiad  \nInternational Information Centre Director: Anton Sirota  \nIUVENTA  \nKarloveská 64 , 84258 Bratislava 1 , Slovakia Phone: +421-907-473367  \nE-mail: [anton.sirota@stuba.sk](anton.sirota@stuba.sk)  \n[Web: www.icho.sk](Web: www.icho.sk)  \nThe original title page:  \nPREPARATORY PROBLEMS  \n50th IChO 2018  \nInternational Chemistry Olympiad SLOVAKIA & CZECH REPUBLIC  \nBACK TO WHERE IT ALL BEGAN  \nPreface  \nWe are happy to introduce the Preparatory Problems for the 50th International Chemistry Olympiad. These problems are intended to make the preparation for the Olympiad easier for both students and their mentors. The problems we prepared cover a wide range of challenging topics in modern chemistry. We based the problems on subjects typically covered in high school chemistry courses as well as six topics of advanced difficulty for the Theoretical part and two topics of advanced difficulty for the Practical part. These topics are listed under “Topics of Advanced Difficulty”, and their applications are shown in the preparatory problems. Based on our experience, each of these topics can be introduced to well-prepared students in two to three hours.  \nBratislava and Prague, January 2018  \nPetra Ménová and Martin Putala , editors  \nFields of Advanced Difficulty  \n1. Thermodynamics: relation of equilibrium constants and standard Gibbs energy, van 't Hoff equation, weak acid-base equilibria  \n2. Kinetics: integrated rate law for first- and second-order reactions, half-life, Arrhenius equation, relaxation methods in chemical kinetics, kinetic isotope effects  \n3. Electrochemistry: electrochemical cells, Nernst-Peterson equation, Latimer, Frost and Pourbaix diagrams  \n4. Inorganic complexes: crystal field theory  \n5. Stereochemistry: organic stereochemistry, diastereoselective reactions  \n6. DNA and RNA: nucleobases, hydrogen bonding between bases and its thermodynamics  \nNotes  \nWe do not expect students to get an advanced training in the following topics met in the preparatory problems as they WILL NOT appear in the exam set.  \n􀁸 Claisen rearrangement  \n􀁸 Chemistry of N-oxides  \n􀁸 Arrow-pushing mechanisms  \n􀁸 Use of spreadsheet software  \n􀁸 Solving cubic equations  \nPolymer chemistry will be covered only from the viewpoint of organic chemistry. No further biochemistry of nucleic acids than covered in the preparatory problems.  \nUnless stated otherwise, the number of significant figures reported by the student will not be evaluated.  \nTHE FIFTIETH  \nINTERNATIONAL CHEMISTRY OLYMPIAD  \n20–29 JULY 2018  \nBRATISLAVA, SLOVAKIA, PRAGUE, CZECH REPUBLIC  \nPREPARATORY PROBLEMS  \nContents  \nTheoretical Problems  \nProblem 1. Synthesis of hydrogen cyanide .........................................................","cbCaiqCh6JTB2xJT","https://ap.wps.com/l/cbCaiqCh6JTB2xJT","pdf",7099763,190,"English","# Preface\n## Fields of Advanced Difficulty\n## Notes\n# Contents\n## Theoretical Problems\n## Practical Problems","[{\"question\":\"What is the purpose of these Preparatory Problems for the 50th IChO?\",\"answer\":\"They are intended to make preparation for the Olympiad easier for both students and their mentors by covering a wide range of challenging modern chemistry topics.\"},{\"question\":\"Which areas are included under Fields of Advanced Difficulty for the theoretical problems?\",\"answer\":\"Thermodynamics, kinetics, electrochemistry, inorganic complexes, stereochemistry, and DNA and RNA topics are listed as advanced fields.\"},{\"question\":\"Are all topics mentioned in the preparatory problems expected to appear in the exam set?\",\"answer\":\"No. The notes state that students are not expected to get advanced training in several listed topics because they WILL NOT appear in the exam set.\"}]","PREPARATORY PROBLEMS FROM THE 50th IChO - Series 4 - Preparatory Problems | PDF",1790517578,479]