Test for Sodium ions (flame test)
1. Platinum wire點Hydrochloric acid, 之後放在Bunsen flame燒一陣
→ to confirm the platinum wire is clean
2. Platinum wire點 crushed sample/ solution
3. 將點了crushed sample/ solution的platinum wire放在Bunsen flame上面燒
4. 看flame顏色
n Lilac (淡紫色) → Potassium
n Brilliant golden yellow (亮金黃色) → Sodium
n Brick Red (磚紅色) → Calcium
n Bluish Green → Copper
Test for water
n Anhydrous copper (II) sulphate
u 遇水地方由白色變藍色
n Blue cobalt paper / Cobalt (II) chloride test paper
遇水地方由藍色轉粉紅色
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