📚 Year 11 Edexcel Chemistry: Key Points for Experimental/Practical Assessment | Year 11 Edexcel 化学：实验/实践考核要点
In Year 11 Edexcel Chemistry, practical skills are assessed alongside theoretical knowledge. Mastering key experiments, accurate measurements, safe techniques, and data analysis are vital for success. This guide summarises the essential practical points you need to know.
在 Year 11 Edexcel 化学课程中，实验技能与理论知识同样会进行考核。掌握核心实验、准确测量、安全操作和数据分析对于取得好成绩至关重要。本文总结了你必须了解的实践考核要点。
1. Safety and Basic Techniques | 安全与基本操作
Always wear safety goggles to protect your eyes from chemical splashes, heat, and flying fragments.
始终佩戴护目镜，保护眼睛免受化学喷溅、高温和飞溅碎片的伤害。
Handle concentrated acids and alkalis with extreme care; add acid to water, never water to acid, to avoid violent exothermic reactions.
操作浓酸和浓碱时要极其小心；应将酸加入水中，切勿将水加入酸中，以避免剧烈的放热反应。
When heating a test tube, point the open end away from yourself and others, and move the tube continuously to prevent bumping.
加热试管时，管口应远离自己和他人，并持续移动试管以防止暴沸。
Tie back long hair and tuck in loose clothing; know the location of the fire extinguisher, eye wash station, and first-aid kit.
绑好长发并束紧宽松衣物；熟知灭火器、洗眼器和急救箱的位置。
Dispose of broken glass in the designated sharps bin, not in ordinary waste bins.
碎玻璃应放入指定的锐器盒，切勿丢入普通垃圾箱。
2. Measurements and Apparatus | 测量与仪器使用
Use the appropriate measuring cylinder for approximate volumes; for precise volumes, a pipette or burette is required, reading the bottom of the meniscus at eye level.
使用合适的量筒测量大致体积；要精确测量体积，需使用移液管或滴定管，并在眼睛水平高度读取弯月面的最低点。
Digital balance readings should be recorded to the nearest 0.01 g or as specified; avoid placing hot objects on the balance.
电子天平读数应记录到0.01克或指定精度；切勿将高温物体放在天平上。
A thermometer should be held in the solution without touching the bottom or sides of the container, and allowed to stabilise before reading.
温度计应悬挂在溶液中，不接触容器底部或侧壁，并待温度稳定后再读数。
Burette taps must be checked for leaks; rinse with the solution to be used to prevent dilution.
滴定管活塞需检查是否漏液；用待装溶液润洗以防止稀释。
Use a volumetric pipette with a pipette filler for accurate single volumes, never pipette by mouth.
使用移液管和吸耳球准确量取单一体积，严禁用嘴吸取。
3. Making a Soluble Salt by Titration | 酸碱滴定制备可溶性盐
Rinse the burette with the acid solution, then fill it, ensuring no air bubbles in the tip; record the initial volume.
用酸溶液润洗滴定管，然后注入酸液，确保尖嘴无气泡；记录初始体积。
Use a pipette to transfer exactly 25.0 cm³ of alkali (e.g. NaOH) into a conical flask; add a few drops of indicator, such as phenolphthalein.
Published by TutorHao | Year 11 Chemistry Revision Series | aleveler.com
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