配制一定溶质质量分数的溶液                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       班级：        姓名：       合作者：                   时间：               

【实验目的】：

1、初步学会配制一定溶质质量分数的溶液。

2、 能正确使用托盘天平和量筒使用等基本实验操作，学会误差分析。

3、通过配制溶液实验，进行科学严谨的实验态度。

【实验用品】：药品：氯化钠，蒸馏水

          仪器：            、             、            （10ml、100ml）、         、      、        。

【探究过程】： 1、配制80g10％的氯化钠溶液

 步骤：(1) 计算 ：氯化钠的质量         g，水的质量      g 。                                                                                                                                                                                                                                                                                （2）称量：用          称出氯化钠 的质量     g ；用    量出水的体积        ml。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

（3 )溶解 ：把称好的氯化钠倒入干燥的烧杯中，再加入量好的水的体积，用玻璃棒充分搅拌，直到氯化钠全部溶解。

（4）装瓶贴标签 ：把配制好氯化钠溶液装入试剂瓶中，盖好瓶塞，贴上标签（注明药品名称和溶质质量分数），放入试剂柜

2、分析影响溶质质量分数

（1）小组讨论：你认为本小组配制的质量分数准确吗？什么原因造成的？                         、                   、

小结：质量分数偏小的原因：__________________ 、 _________________、______________、  _________________ 等、

质量分数偏大的原因：  ____________________________ 。

无影响的： ________________________________________。

    

 

        

       

小组实验互评量表

 

第二篇：实验报告三

 

实验报告

　　　2015　　至　2016　　学年第　一　学期

课程名称：       　　　　          

院（系）:       　　　　　　　　　　　　　       

专    业：        　　　　         

班    级：       　　　　          

学    号：        　　　　         

学生姓名：        　　　　         

年     月     日

 兰州城市学院实验报告

院、系 传媒学院  教育技术学　　　　　　　　　　　　

第　　页，共　　页

第　　页，共　　页