举例说明:
Examples are given to illustrate:
用5.0mol/L虚拟货币钱包app：硫酸铜溶液配制250mL0.10mol/L虚拟货币钱包app：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:计算
Step 1: Computing
稀释前后溶质的物质的量不变:
The amount of solute remained unchanged before and after dilution.
5*V[CuSO4(aq)]=250*0.1(没有带单位)
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虚拟货币钱包app：硫酸铜溶液,并将它倒入小烧杯中.
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:稀释
Step 3: Dilution
在盛有虚拟货币钱包app：硫酸铜的小烧杯中加入适量蒸馏水,并加入少量的硫酸防止水解,用玻璃棒搅拌,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:洗涤:用蒸馏水洗烧杯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:倒水至刻度线1-2cm处改用胶头滴管滴到与凹液面平直.
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:摇匀:盖好瓶塞,上下颠倒、摇匀.
Step 7: Shake well: Cover the bottle stopper, turn upside down and shake well.
第八步:装瓶、贴签
Step 8: Bottling and labeling
虚拟货币钱包app：硫酸铜标定:
Calibration of copper sulfate:
我只能提供参考
I can only provide reference.
取一定体积的配制好的溶液3等份,在每一分滴加氢氧化钠溶液到不再有沉淀析出,过滤、低温烘干、冷却、称量,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.