在物理化學裡,飽和溶液是一種物質不能夠再溶解更多物質的溶液而且加入額外量的物質將呈現沈澱。若溶液中有雜質存在,則造成溶液為不飽和而且能夠溶解更多的物質,此種溶液變成過飽和溶。過飽和溶液較飽和溶液有更多的溶質溶解在溶劑中,這種狀態屬於介穩態
。若加入一些固體的晶體或晃動使其產生微小的結晶,則此狀態會失去平衡,過多的溶質會結晶出來,並且放出熱量。緩慢地滴加醋酸鈉過飽和溶液在醋酸鈉的晶體上,
會形成類似石筍的醋酸鈉結晶。
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用60倍放大拍攝醋酸鈉結晶
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgw3k7dHGV-bIOAhizBczM7q3gPB6uRhd-moXvoaatLEz08IVuYLXUYlniDCpKOIuOn1Oqz1wBtZjvME8ShCjayZSxKeGFJlRJ2IOeZWqQI9ja_hn0dQ7U1dTKGpSkkjBPGx5uEuGXwTVI/s640/20200712_170259.jpg)
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醋酸鈉很安全 晚上小朋友發現 芝麻醬裡面有醋酸鈉 豆干裡面有醋酸鈉 洋芋片裡面有醋酸鈉 醋酸鈉常常用在食品的調味 提供食品酸味
以後小朋友是這些化學的食品 也許會多一點點的心理障礙
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