[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207958-en":3,"doc-seo-207958-105":30,"detail-sidebar-cat-0-en-105":90},{"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":4,"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},207958,13056712833777,"Paura","https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0",4,"Exam","Reactivity of Metals - Mark Schemes","Mark schemes covering question responses and award criteria for reactivity series and related chemistry topics. Includes identification of reaction evidence such as colour changes, deposits and gas production, calculation and interpretation of experimental data, and acceptance rules for valid alternative answers. Also addresses electrolysis observations with electrodes, oxidation and reduction principles, particle composition, and extraction or treatment rationales such as concentration, impurity removal, corrosion resistance and environmental impacts.","Mark schemes  \n1. (a) Whether there was a reaction or not  \n(b) brown / orange / dark deposit on zinc  \nor  \nblue solution turns colourless / paler  \n(c) Variable Measuring instrument  \nmore than one line drawn from a variable negates the mark  \n(d) (Most reactive) Magnesium  \nZinc  \n(Least reactive) Copper  \nmust all be correct  \n1  \n(e) would not be safe or  \ntoo reactive  \nallow too dangerous  \n1  \n(f) Gold  \n1  \n(g) 2Fe2O3 + 3C → 4Fe + 3CO2  \nallow multiples  \n1  \n(h) carbon  \n1  \n(i) Loss of oxygen  \n1  \n[10]  \n[www.accesstuition.com](www.accesstuition.com)  \nPage 2 of 6  \n2.  \n(a) any two from:  \n• concentration / volume of dilute hydrochloric acid  \n• mass of metal powder  \n• surface area of metal powder  \n• stirring (of any) / rate of stirring  \nallow reacted for the same length of time  \n2  \n(b) 4.2 °C  \nallow Magnesium Test 2  \n1  \nand any one from:  \n• lower mass of magnesium added  \n• surface area of magnesium too low  \n• magnesium coated in magnesium oxide (so took a while to start reacting)  \n• not stirred  \n• not stirred as quickly as the other metals  \n• not reacted for as long a time as the other metals  \nallow reason for break in circuit  \n1  \n(c) 17.4(°C)  \n1  \n(d) bubbles of gas  \n1  \nmore (bubbles) seen with calcium than other metals  \nallow any correct comparison between two metals  \n1  \n(e) any value between 7.9 °C and 12.3 °C  \n1  \n[8]  \n[www.accesstuition.com](www.accesstuition.com)  \nPage 3 of 6  \n3.  \n(a) (i) calcium oxide  \nin either order  \ncarbon dioxide  \naccept correct formulae  \n(ii) C(s) + CO2(g) → 2CO(g)  \nallow multiples  \n(iii) 210 (tonnes)  \naward 3 marks for the correct answer with or without allow ecf for arithmetical errors  \nif answer incorrect allow up to 2 marks for any of the  \n160 → 112  \n300 → 112 / 160 × 300  \nor  \nmoles Fe2 O3 = 1.875 (× 106) or 300 / 160 moles ofFe = 3.75 (× 106) or 2 × moles Fe2 O3 mass Fe = moles Fe × 56  \n105 (tonnes) scores 2 (missing 1:2 ratio)  \n420 (tonnes) scores 2 − taken Mr of iron as 112  \n1  \n1  \n1  \nworking steps below:  \n3  \n[www.accesstuition.com](www.accesstuition.com)  \nPage 4 of 6  \n4.  \n(b) (i) aluminium is more reactive than carbon or carbon is less reactive than aluminium  \nmust have a comparison of reactivity of carbon and aluminium accept comparison of position in reactivity series.  \n1  \n(ii) (because) aluminium ions are positive  \nignore aluminium is positive  \n1  \nand are attracted / move / go to the negative electrode / cathode  \n1  \nwhere they gain electrons / are reduced / Al3+ + 3e − → Al  \naccept equation or statements involving the wrong number of  \nelectrons.  \n1  \n(iii) (because) the anodes or (positive) electrodes are made of carbon / graphite  \n1  \noxygen is produced (at anode)  \n1  \nwhich reacts with the electrodes / anodes  \ndo not accept any reference to the anodes reacting with oxygen  \nfrom the air  \nequation C + O2  CO2 gains 1 mark (M3)  \n1  \n[13]  \n(a) gold  \n1  \n(b) atom (s)  \n1  \n(c) (i) protons  \nany order  \nallow proton  \n1  \nneutrons  \nallow neutron  \n1  \n(ii) 3 / three  \n1  \n(d) (i) Al  \nignore any numbers / charges  \n1  \n[www.accesstuition.com](www.accesstuition.com)  \nPage 5 of 6  \n5.  \n(ii) any two from:  \n• limited resource  \n• expensive in terms of energy / mining  \n• effects on the environment, such as, landfill, atmospheric pollution, quarrying  \nallow uses a lot of energy to extract.  \n2  \n(e) resistant to corrosion  \n1  \ndoes not react (with water or food)  \nallow one mark for low density with a suitable reason given  \n1  \n[10]  \n(a) The ore is not pure or contains impurities or the ore does not contain 100% of the metal  \ncompound  \nallow to concentrate the metal or metal compound  \n1  \nrock / other compounds need to be removed / separated  \n1  \n(b) (i) (cast iron is) brittle  \nallow not strong  \nignore weak  \n1  \n(ii) the oxygen reacts with carbon  \nallow carbon burns in oxygen or is oxidised  \n1  \nreducing the percentage of carbon in the mixture  \nor producing carbon dioxide  \n1  \n(c) (i) aluminium h","cbCaik7pqVfeAtCQ","https://ap.wps.com/l/cbCaik7pqVfeAtCQ","pdf",1517958,1,5,"English","en",105,"# Mark schemes\n## Reaction evidence and experimental data\n## Calculations and acceptance rules\n## Electrolysis, particles and extraction\n## Corrosion resistance and environmental impacts","[{\"question\":\"What types of evidence indicate whether a metal reacts in the reactivity series questions?\",\"answer\":\"Answers accept observations such as a colour change, formation of a deposit on zinc, or gas bubbles appearing in tests. Alternative valid descriptions matching the observation are also credited.\"},{\"question\":\"How are marks awarded when measuring instruments or plotted lines are involved?\",\"answer\":\"The scheme awards marks only when the measuring approach is valid, and notes that drawing more than one line from a variable can negate the mark. It also specifies acceptance conditions for correct reasoning tied to experimental method.\"},{\"question\":\"What electrolysis concepts are required for the related mark scheme questions?\",\"answer\":\"Responses must explain electrode roles, including that anodes/positive electrodes produce oxygen which reacts with the electrodes, and that ions migrate toward the cathode where electrons are gained and reduction occurs. Correct or properly formed equations are accepted within stated constraints.\"}]","Reactivity of Metals - Mark Schemes | PDF",1788601915,13,{"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":85,"head_meta":87,"extra_data":89,"updated_unix":28},"reactivity-of-metals-mark-schemes","",{"@graph":36,"@context":84},[37,53,67],{"@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/reactivity-of-metals-mark-schemes/207958/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":61,"encodingFormat":60,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":64,"interactionType":65,"userInteractionCount":4},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"What types of evidence indicate whether a metal reacts in the reactivity series questions?","Question",{"text":74,"@type":75},"Answers accept observations such as a colour change, formation of a deposit on zinc, or gas bubbles appearing in tests. Alternative valid descriptions matching the observation are also credited.","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"How are marks awarded when measuring instruments or plotted lines are involved?",{"text":79,"@type":75},"The scheme awards marks only when the measuring approach is valid, and notes that drawing more than one line from a variable can negate the mark. It also specifies acceptance conditions for correct reasoning tied to experimental method.",{"name":81,"@type":72,"acceptedAnswer":82},"What electrolysis concepts are required for the related mark scheme questions?",{"text":83,"@type":75},"Responses must explain electrode roles, including that anodes/positive electrodes produce oxygen which reacts with the electrodes, and that ions migrate toward the cathode where electrons are gained and reduction occurs. 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