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酸鹼中和,酸鹼滴定

互联网 2021-04-18 10:26:52
簡介: 本資源為一模擬實驗,實驗主要介紹如何利用已知濃度的酸(或鹼)來滴定未知濃度的鹼(或酸),並計算出酸的濃度。

學習重點:學生能

認識酸和鹼會互相中和及產生中性的產物 掌握如何透過滴定來找出未知濃度的鹼(或酸)的濃度教學建議:教師可先讓學生觀看「示範步驟」中的「示範操作」,令他們對酸鹼滴定的過程有一定的認識。 教師之後可讓學生以「手動操作」自行選擇酸、鹼及適當的指示劑進行滴定。完成模擬實驗後再利用「動畫」向學生解釋中和作用和滴定的化學反應基礎。 教師最後可向學生演示不同的「滴定圖形」讓學生明白不同強度的酸鹼中和可利用不同的指示劑,得出的滴定圖形亦各異。使用說明:本資源需配合 Adobe Flash Player 10 使用。下載 Adobe Flash Player 10

Description: This resource is a simulation experiment which illustrates how to use the results of titrations to calculate the concentration of an unknown acid (or alkali).

Learning Objectives: Students should be able to

recognize that neutralization of acids and alkalis get water and salt acquire some knowledge about the use of titration results to calculate the concentration of an unknown acid (or alkali)Teaching Suggestions: Teachers may first allow students to view the "示範操作" . Students can acquire some information about acid-alkali titration. Teachers can allow students to work on the "手動操作" independently by allowing them to choose acid, alkali and indicator to perform their own titration. After this hands-on activity, teachers can show students the "動畫" which explains neutralization and titration at microscopic level. Before the end of the lesson, teachers may show different titration curves to students and allow them to recognize that different indicators may be used in neutralization of acids and alkalis of different strength. In addition, neutralization of acids and alkalis of different strength yield titration curves of different shape. User Tips:Adobe Flash Player 10is required to play this resource.Download Adobe Flash Player 10

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