改良天然指示劑的儲存方法（學生版）Improving storage method for natural indicators (Student's version)
STEM連繫 9.2STEM connection 9.2改良天然指示劑的儲存方法Improving storage method for natural indicators
學習技能：Learning skill:
DIYDIY
難度﹕Difficulty:
★
時間﹕Time:
1節課1 lesson
自製「紅椰菜試紙」Making ‘red cabbage paper’
步驟Procedures
1. 依照課本中實驗9.1的步驟，製備一些紅椰菜溶液。
1. Prepare some red cabbage solution as in Experiment 9.1.
2. 把濾紙浸在紅椰菜溶液中約10分鐘。
2. Soak some filter paper in the red cabbage solution for about 10 minutes.
3. 把濾紙取出，放在白瓷磚上，讓它們變乾。
3. Put the filter paper on a white tile and let them dry.
4. 你已製成「紅椰菜試紙」了！
4. You have now prepared some ‘red cabbage paper’.
如何使用How to use
當我們把「紅椰菜試紙」放進酸和鹼時…
When we put the ‘red cabbage paper’ in acidic solution and alkaline solution…
試想想Think about
1.
What is the working principle of the ‘red cabbage paper’?
2.
試指出你會如何設計「紅椰菜試紙」的包裝，並在市場上出售。
2.
Suggest how you would design the package of the ‘red cabbage paper’ so that you can sell in the market.