一定物质的量浓度溶液的配制实验报告

班级：                       姓名：          

实验目的：1、练习配制一定物质的量浓度的溶液。

2、加深对物质的量浓度概念的理解。

3、练习容量瓶、胶头滴管的使用方法。

实验用品：烧杯、容量瓶（100mL）、胶头滴管、量筒、玻璃棒、药匙、滤纸、托盘天平、NaCl（s）、蒸馏水。

实验内容：配制100mL1.00 mol/L的NaCl溶液

（一）实验步骤：

1、计算：需要NaCl固体的质量为       g。

2、称量：用托盘天平称量时，称量NaCl固体的质量为       g。

3、溶解：把称好的NaCl固体放入       中，用量筒量取      ml蒸馏水溶解。

4、移液：待溶液       后，将烧杯中的溶液用         引流注入容量瓶中。

5、洗涤：用少量蒸馏水洗涤烧杯内壁          次，洗涤液也都注入容量瓶。轻轻晃动容量瓶，使溶液混合均匀。

6、定容：将蒸馏水注入容量瓶，液面离容量瓶颈刻度线下        时，改用         滴加蒸馏水至               。

7、摇匀：盖好瓶塞，反复上下颠倒，                。

8、装瓶：将配制好的试剂倒入试剂瓶。

（二）误差分析

 

第二篇：实验报告

         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： ________________________________________。

    

 

        

       

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