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初学化学者,对于含氧酸酸酐的求法,往往感到困难。为此,我提出一个简单的求法:1.当含氧酸分子中含氢原子数为偶数时,可按氢原子的个数,按水分子的组成比例减去氢、氧原子,余下部分就是该酸的酸酐。例如硫酸(H_2SO_4)就符合上述条件,硫酸分子中减去一个水分子就得到硫酸的酸酐——三氧化硫。
Beginner chemists often find it difficult to find oxyacid anhydrides. To this end, I propose a simple solution: 1. When the number of hydrogen atoms in an oxoacid molecule is even, hydrogen and oxygen atoms can be subtracted from the composition of the water molecule by the number of hydrogen atoms. The rest is The acid anhydride. For example, sulfuric acid (H_2SO_4) meets the above conditions, and one molecule of water is subtracted from the sulfuric acid molecule to obtain sulfuric acid anhydride, sulfur trioxide.