摘要
固体酒精因其无烟、无污染、燃烧值高、生产简单、使用方便,广泛应用于餐厅用餐和旅游野餐.焰色反应是化学教材中的一项重要实验,但存在展示不方便、效果不明显等问题.研究了硬脂酸钠和醋酸钙制作固体酒精的条件,比较了 2种固化剂对固体酒精外观、燃烧时间、燃烧气味和燃烧后残留物的影响;探索添加不同金属阳离子对制备的固体酒精外观的影响及其燃烧时的焰色反应,提高了固体酒精的观赏性.该科普实验操作方便、便于展示、互动性强,可面向不同群体进行化学科学素养的提升.
Abstract
Solid alcohol is widely used in restaurant dining and tourist picnics due to its smoke-free,pollution-free,high combustion value,simple production,and convenient use.Flame reaction is an important experiment in chemistry textbooks,but it has the disadvantages of inconvenient display and unclear effect.This article studied the conditions for making solid al-cohol from sodium stearate and calcium acetate,and compared the effects of the two curing a-gents on the appearance,burning time,burning odor,and residue after combustion of solid al-cohol.The effect of adding different metal cations on the appearance of the prepared solid alcohol and the flame reaction during combustion were explored to improve the appreciation of solid alco-hol.This popular science experiment is easy to operate,display and interactive,and can be used to improve the chemical scientific literacy of different groups.
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