论文部分内容阅读
一定物质的量浓度溶液的配制,是高中生必须掌握的实验技巧和操作,也是其他实验的基础。该项实验的误差分析,历来也是高考必考的热点,对于该实验的挖掘也是挖不胜挖。我们看一道常见题:下列操作会引起所配溶液的浓度偏大的是()A.用量筒量取浓硫酸时,仰视量筒的刻度B.往容量瓶转移溶液时,有少量的液体溅出C.定容时仰视刻线D.用量筒量取浓硫酸时,量筒内有少量蒸馏水该类题非常常见,各类高考模拟题经常出现,那么这道题究
A certain amount of substance concentration solution preparation, high school students must master the experimental techniques and operations, but also the basis of other experiments. The error analysis of the experiment, the entrance exam has always been the hot spot for the excavation of the experiment is digging victorious. We look at a common problem: the following operation will cause the concentration of the solution is too large () A. When the amount of measuring cylinder to take concentrated sulfuric acid, look down the graduated cylinder B. When transferring solution to the volumetric flask, a small amount of liquid spilled C. Constant volume when looking up engraved line D. Volume measuring cylinder to take concentrated sulfuric acid, a small amount of distilled water cylinder This kind of problem is very common, all kinds of college entrance examination simulation questions often appear, then this problem