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金沙城线路检测中心:硫酸铜标準溶液怎麼配制及标定

網址:www.ejyhg.com  2019-08-13  作者:admin    閱讀:

舉例說明:
Examples are given to illustrate:
用5.0mol/L金沙城线路检测中心:硫酸铜溶液配制250mL0.10mol/L金沙城线路检测中心:硫酸铜溶液
Preparation of 250 mL 0.10 mol/L copper sulfate solution with 5.0 mol/L copper sulfate solution
第一步:計算
Step 1: Computing
稀釋前後溶質的物質的量不變:
The amount of solute remained unchanged before and after dilution.
5*V[CuSO4(aq)]=250*0.1(沒有帶單位)
5 * V [CuSO4 (aq)] = 250 * 0.1 (without units)
V[CuSO4(aq)]=5mL
V [CuSO4 (aq)]= 5mL
第二步:量取
Step 2: Measure
用在10mL量筒取5.0mL5.0mol/L金沙城线路检测中心:硫酸铜溶液,并将它倒入小燒杯中.
Use 10 mL measuring cylinder to take 5.0 mL 5.0 mol/L copper sulfate solution and pour it into a small beaker.
第三步:稀釋
Step 3: Dilution
在盛有金沙城线路检测中心:硫酸铜的小燒杯中加入适量蒸餾水,并加入少量的硫酸防止水解,用玻璃棒攪拌,使其溶解.
A small beaker containing copper sulphate is added with distilled water and a small amount of sulphuric acid to prevent hydrolysis. The beaker is stirred with a glass rod to dissolve it.
第四步:移液
Step 4: Transfusion
将溶液沿玻璃棒注入250ml容量瓶中.
The solution was injected into a 250 ml capacity bottle along the glass rod.
第五步:洗滌:用蒸餾水洗燒杯2-3次,并倒入容量瓶中.
Step 5: Wash: Wash the beaker 2-3 times with distilled water and pour it into the capacity bottle.
第六步:定容:倒水至刻度線1-2cm處改用膠頭滴管滴到與凹液面平直.
Step 6: Volume fixing: pour water to 1-2 cm of scale line and use rubber head dropper to drip straight with concave liquid level.
第七步:搖勻:蓋好瓶塞,上下颠倒、搖勻.
Step 7: Shake well: Cover the bottle stopper, turn upside down and shake well.
第八步:裝瓶、貼簽
Step 8: Bottling and labeling
金沙城线路检测中心:硫酸铜标定:
Calibration of copper sulfate:
我隻能提供參考
I can only provide reference.
取一定體積的配制好的溶液3等份,在每一分滴加氫氧化鈉溶液到不再有沉澱析出,過濾、低溫烘幹、冷卻、稱量,求平均值
Take 3 equal parts of a certain volume of the prepared solution, in every drop of sodium hydroxide solution to no precipitation, filtration, low temperature drying, cooling, weighing, and calculate the average value.

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