[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207941-en":3,"doc-seo-207941-105":30,"detail-sidebar-cat-0-en-105":89},{"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},207941,13056703019404,"Miles","https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0",4,"Exam","RP 4 - Temperature Changes","This document outlines Required Practical 4 for AQA Chemistry GCSE, focusing on investigating temperature changes in chemical reactions. It details the aim, equipment list, and a step-by-step method for conducting the experiment. The experiment involves measuring the temperature change when hydrochloric acid reacts with sodium hydroxide solution in an expanded polystyrene cup. Key steps include measuring initial temperatures, adding measured volumes of sodium hydroxide solution incrementally, stirring, and recording the maximum constant temperature. The method emphasizes repeating measurements for reliability and calculating mean maximum temperatures. Safety precautions, such as wearing safety goggles, are also highlighted. The document includes a diagram illustrating the experimental setup with a thermometer, polystyrene cup, and the mixture solution, indicating temperature change (ΔT). This practical is designed to help students understand how to investigate variables affecting temperature changes in chemical reactions.","AQA Chemistry GCSE  \nRequired Practical 4  \nTemperature Changes  \nMethods taken from the AQA Required Practical Handbook  \nTemperature Changes  \nAim  \nInvestigate the variables that affect temperature change in chemical reactions.  \nEquipment list  \n● 2 M hydrochloric acid  \n● 2 M sodium hydroxide solution  \n● Expanded polystyrene cups and lids with thermometer holes  \n● Thermometers  \nMethod  \n1. Measure 25cm3 of hydrochloric acid into a polystyrene cup.  \n2. Place the cup inside the beaker to make it more stable.  \n3. Measure and record the temperature of the hydrochloric acid.  \n4. Measure 5cm3 of sodium hydroxide and add it to the polystyrene cup.  \n5. Quickly put a lid on the cup and gently stir the solution with the thermometer through the hole of lid.  \n6. When the reading on the thermometer stops changing and becomes fairly constant, record the temperature.  \n7. Repeat steps 4 and 5 to add further 5 cm3 amounts of sodium hydroxide to the cup. A minimum total of 40 cm3 needs to be added.  \n8. Repeat steps 1–7 to ensure reliability of results.  \n9. Calculate the mean maximum temperature reached for each of the sodium hydroxide volumes  \nDiagram  \nSafety Precautions  \n● Wear safety goggles.","cbCait6zsDLt6yKt","https://ap.wps.com/l/cbCait6zsDLt6yKt","pdf",100907,1,3,"English","en",105,"# AQA Chemistry GCSE\n## Required Practical 4\n### Temperature Changes\n## Aim\n## Equipment list\n## Method\n## Safety Precautions","[{\"question\":\"What is the aim of Required Practical 4?\",\"answer\":\"The aim is to investigate the variables that affect temperature change in chemical reactions, specifically by observing the reaction between hydrochloric acid and sodium hydroxide.\"},{\"question\":\"What equipment is needed for this practical?\",\"answer\":\"The essential equipment includes 2 M hydrochloric acid, 2 M sodium hydroxide solution, expanded polystyrene cups with lids and thermometer holes, and thermometers.\"},{\"question\":\"What are the key steps in the method?\",\"answer\":\"The method involves measuring and recording the initial temperature of hydrochloric acid, adding measured amounts of sodium hydroxide solution incrementally, stirring the mixture, and recording the maximum constant temperature reached after each addition.\"}]","RP 4 - Temperature Changes | PDF",1788601878,8,{"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":84,"head_meta":86,"extra_data":88,"updated_unix":28},"rp-4-temperature-changes","",{"@graph":36,"@context":83},[37,52,66],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,50],{"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":21},"https://docshare.wps.com/document/exam/",{"item":51,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/rp-4-temperature-changes/207941/",{"url":51,"name":13,"@type":53,"author":54,"headline":13,"publisher":56,"fileFormat":59,"inLanguage":23,"description":14,"dateModified":60,"datePublished":60,"encodingFormat":59,"isAccessibleForFree":61,"interactionStatistic":62},"DigitalDocument",{"name":9,"@type":55},"Person",{"url":41,"name":57,"@type":58},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":63,"interactionType":64,"userInteractionCount":4},"InteractionCounter",{"@type":65},"ViewAction",{"@type":67,"mainEntity":68},"FAQPage",[69,75,79],{"name":70,"@type":71,"acceptedAnswer":72},"What is the aim of Required Practical 4?","Question",{"text":73,"@type":74},"The aim is to investigate the variables that affect temperature change in chemical reactions, specifically by observing the reaction between hydrochloric acid and sodium hydroxide.","Answer",{"name":76,"@type":71,"acceptedAnswer":77},"What equipment is needed for this practical?",{"text":78,"@type":74},"The essential equipment includes 2 M hydrochloric acid, 2 M sodium hydroxide solution, expanded polystyrene cups with lids and thermometer holes, and thermometers.",{"name":80,"@type":71,"acceptedAnswer":81},"What are the key steps in the method?",{"text":82,"@type":74},"The method involves measuring and recording the initial temperature of hydrochloric acid, adding measured amounts of sodium hydroxide solution incrementally, stirring the mixture, and recording the maximum constant temperature reached after each addition.","https://schema.org",{"og:url":51,"og:type":85,"og:title":13,"og:site_name":57,"og:description":14},"article",{"robots":87,"canonical":51},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":90},[91,95,99,102,107,112,117,121,126,129,133],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":92,"show_sort_weight":93,"slug":94},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":96,"show_sort_weight":97,"slug":98},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":100,"slug":101},70,"exam",{"id":103,"doc_module":4,"doc_module_name":46,"category_name":104,"show_sort_weight":105,"slug":106},5,"Comic",60,"comic",{"id":108,"doc_module":4,"doc_module_name":46,"category_name":109,"show_sort_weight":110,"slug":111},6,"Technology",50,"technology",{"id":113,"doc_module":4,"doc_module_name":46,"category_name":114,"show_sort_weight":115,"slug":116},7,"Healthcare",40,"healthcare",{"id":29,"doc_module":4,"doc_module_name":46,"category_name":118,"show_sort_weight":119,"slug":120},"Research & Report",30,"research-report",{"id":122,"doc_module":4,"doc_module_name":46,"category_name":123,"show_sort_weight":124,"slug":125},9,"Religion & Spirituality",20,"religion-spirituality",{"id":124,"doc_module":4,"doc_module_name":46,"category_name":127,"show_sort_weight":124,"slug":128},"World Cup","world-cup",{"id":130,"doc_module":4,"doc_module_name":46,"category_name":131,"show_sort_weight":130,"slug":132},10,"Lifestyle","lifestyle",{"id":134,"doc_module":4,"doc_module_name":46,"category_name":135,"show_sort_weight":103,"slug":136},19,"General","general"]