AQA 9620 CH03 2016 Mark Scheme Q2: Practical Analysis Made Simple | AQA 9620 CH03 2016 评分方案第 2 题：实验分析轻松拿分

📚 AQA 9620 CH03 2016 Mark Scheme Q2: Practical Analysis Made Simple | AQA 9620 CH03 2016 评分方案第 2 题：实验分析轻松拿分

Question 2 in the AQA 9620 CH03 2016 mark scheme is a classic practical-analysis question. It takes a student investigation and asks you to calculate results, comment on uncertainty, identify anomalies, and evaluate the method. This article breaks down the exact skills examiners rewarded so you can answer quickly and accurately.

在 AQA 9620 CH03 2016 年评分方案中，第 2 题是一道典型的实验分析题。题目给出学生的实验调查，要求你计算实验结果、讨论不确定度、识别异常值并评价实验方法。本文拆解阅卷老师给分的具体技能，帮助你快速、准确地作答。

1. What Q2 in CH03 2016 Tests | 第 2 题考查什么

In the AQA International A-Level Chemistry 9620, Unit 3 (CH03) focuses on practical and investigative skills. Question 2 in the 2016 mark scheme is usually a data-analysis and evaluation item. It often presents repeated measurements from a titration, calorimetry, or rate experiment, then asks you to process the data and judge the quality of the procedure.

在 AQA 国际 A-Level 化学 9620 中，第 3 单元（CH03）侧重考查实验与探究技能。2016 年评分方案中的第 2 题通常属于数据分析与评价题。题目往往给出滴定、量热或速率实验中的多次测量数据，然后要求你处理数据并评价实验方案的质量。

Examiners look for precise calculations, correct significant figures, valid reasons for anomalies, and evaluation points that link to the method. Generic statements such as ‘be more careful’ do not score.

阅卷老师关注计算是否精确、有效数字是否正确、异常值的原因是否合理，以及评价是否与具体方法相关。像“更小心操作”这类空泛表述不得分。

2. Reading Results Tables Like an Examiner | 像考官一样阅读数据表

Before calculating, scan the table for anomalous values and rough trials. In the 2016 CH03 Q2, a common mark is given for identifying that the first run is a rough trial or that two titres are not concordant because they differ by more than 0.10 cm³.

计算前先快速检查表格中的异常值和粗滴定。在 2016 年 CH03 第 2 题中，常见给分点是识别出第一次实验是粗滴定，或两次滴定体积相差超过 0.10 cm³ 因此不重合。

Use the table to subtract correctly: titre = final burette reading – initial burette reading. Check that all readings are given to two decimal places, as expected from a burette.

利用表格正确做减法：滴定体积 = 滴定管末读数 – 滴定管初读数。检查所有读数是否保留两位小数，因为滴定管读数通常要求记录到两位小数。