[分享] 鈉的理化實驗爆炸
本週日家教時
學生提及上週二班上有個同學做理化實驗
把第二顆Na丟到泡在水中的Na
結果火整個竄上來 燒傷了角膜(該學生未戴眼鏡)
所幸送醫後無大礙;
學生好奇的問我:『老師,為何會爆炸呢?』
以下是我的回答 望各位先進若有錯誤不吝指正:
『首先,燃燒有三要素,可燃物、助燃物、達到燃點
Na丟到水中產生H2,有可燃物
空氣中有O2,有助燃物
我推測在兩個Na互相碰撞時,產生了火花,就像打火機或甩炮一樣
因此在一瞬間達到燃點 點燃了H2』
不知道各位理化老師想法如何?
該生求知慾甚強 問我亞鐵為何物(我有要他背亞鐵離子)
但我只能以Fe2+少於Fe3+ 故稱之為亞鐵回答之
不知是否有對化學更理解的先進指點一二?何以有Fe2+存在呢?
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 123.192.17.85
→
02/22 01:09, , 1F
02/22 01:09, 1F
推
02/22 02:08, , 2F
02/22 02:08, 2F
→
02/22 02:08, , 3F
02/22 02:08, 3F
→
02/22 02:09, , 4F
02/22 02:09, 4F
→
02/22 02:09, , 5F
02/22 02:09, 5F
→
02/22 02:11, , 6F
02/22 02:11, 6F
→
02/22 02:12, , 7F
02/22 02:12, 7F
→
02/22 02:12, , 8F
02/22 02:12, 8F
→
02/22 02:14, , 9F
02/22 02:14, 9F
→
02/22 02:15, , 10F
02/22 02:15, 10F
推
02/22 23:38, , 11F
02/22 23:38, 11F
→
02/22 23:38, , 12F
02/22 23:38, 12F
→
02/24 00:31, , 13F
02/24 00:31, 13F
→
02/24 00:34, , 14F
02/24 00:34, 14F
→
02/24 00:39, , 15F
02/24 00:39, 15F
→
02/24 00:40, , 16F
02/24 00:40, 16F
→
02/24 00:40, , 17F
02/24 00:40, 17F
→
02/24 08:47, , 18F
02/24 08:47, 18F
推
02/24 23:52, , 19F
02/24 23:52, 19F