摘要或動機

The research mainly discuss the influence on the rate of zinc iodine with different
solution as catalytic agent. We use water, acid water, ethanol methanol acid ethanol,
and acid methanol and so on as different solution to participate in the process
of an equation： Zn+I₂ → ZnI₂ to work out the variation of the product's amount. Besides,
we also change the proportion of Zinc and Iodine to discuss the difference between
the proportion of reactant and the product's amount. The result shows that the product
of this equation is ZnI₂ not Zn(I₃)₂. Ethanol and methanol have the same effect
as water to accelerate the process of the equation. We find out that this reaction
get higher product's amount in acid condition. Also, put the mass Zinc with the
mass iodine can get higher product's
amount, Furthermore, acid in specific range
(0.01M—1.00M), the denser the acid is, the higher product's amount we get. But how
the water as catalytic agent work in the reaction is the direction we can research
deeply in the days to come.



鋅和碘作用生成碘化鋅的反應，是用水作為催化劑，然而一小滴水卻使這個反應劇烈進 行，我們嘗試了多種和水具有相同作用的催化劑，由於反應時間極短不易測量，我們考慮由
產率部分著手，讓原本只需一小滴的水〈催化劑〉改為此反應的溶劑，計算其產率的變化。


實驗分為三部分，第一部份先是改變不同的溶劑，讓鋅和碘在不同溶劑〈水、酸化水、乙醇、酸化乙醇、甲醇、酸化甲醇〉下反應，計算出產率的變化，我們發現在酸中的產率的確較不加酸者來得高。第二部分我們改變加入鋅和碘的量，改變鋅和碘的比例，讓鋅由過量到成為此反應的限量試劑，觀察其產率的變化，我們發現碘作為限量試劑較鋅作為限量試劑的產率高。由於此反應在酸中產率較高，但酸的濃度高低是否又會影響產率呢？我們繼續第三部分的實驗，改變酸的濃度，讓此反應在不同的酸化水濃度的溶劑下反應，討論產率和酸濃度的關係，我們發現在一定範圍內〈0.01M~0.5M〉，酸的濃度越高，產率亦越高。

實驗方法是將鋅和碘置入同一試管中反應，並使其在不同溶劑中反應，接著離心，將碘化鋅水溶液與未反應完的反應物分離，將所得的碘化鋅水溶液使用結晶法得到碘化鋅晶體，秤重並計算其產率。