英语翻译4.2ProductionofReagent1,1l:1.Measure1lH2SO475%ina1lmeasuringcylinderandfillitina1lflaskblack.2.Closetheflaskandlabeltheflask.3.Checkiftheflaskisnotleaking.4.Repeatthesteps1.-3.forflask2.-4.4.3Product

Question

英语翻译
4.2 Production of Reagent 1,1l:
1.Measure 1l H2SO4 75% in a 1l measuring cylinder and fill it in a 1l flask black.
2.Close the flask and label the flask.
3.Check if the flask is not leaking.
4.Repeat the steps 1.- 3.for flask 2.-4.
4.3 Production of Reagent 2,250ml:
1.Prepare under cooling a 20% H2SO4 after densitiy (r = 1,139 g/cm3 at 20°C) using approx.220 ml ultrapure water and approx.40 ml H2SO4 80%.For a bigger batch use according multiple amounts.
2.Measure 250 ml (± 1.5 ml) H2SO4 20% with a measuring cylinder.
3.Put a weighing dish on a balance (for analysis) and tare.
4.Weigh in 1.265 g Ag2SO4 with the help of an applicator.
5.Fill up with 20% H2SO4 to approx.200 ml.
6.Stirr until it is completly desolved.
7.Weigh in 0.809 g K2Cr2O7 with the help of an applicator in a weighing dish.
8.In an extractor hood transfer the weighed in amount of K2Cr2O7 with the rest of 20% H2SO4 completely into the beaker.
9.Stirr at 40°C (heating plate) until it is completely desolved.
10.Transfer the warm reagent in a 250 ml flask black.
11.Close the flask and label the flask
12.Check if the flask is not leaking.
4.4 Production of Reagent 3,50g:
1.Put a 100 ml plastic flask on a balance (for analysis) and tare.
2.Weigh in 50 g saccharose with the help of an applicator and a powder funnel.
3.Close the flask and label the flask.

Answer 1

4.2试剂配方制作1（一升）
1.使用量筒测量出一升的浓度为75％的硫酸并将其放入一个可盛一升的量筒
2.盖上烧杯的盖子并在其上贴上标签
3.查看烧杯是否有泄漏情况
4.重复1至3步
4.3试剂配方制作2（250毫升）
1 准备20％稀释的硫酸,使其浓度为(r = 1,139 g/cm3 at 20°C),并用大约220毫升的纯净水及稀释80％的硫酸使其冷却.若希望得到更多的成品则需增加每项的量.
2 用一个量筒测量250毫升的稀释20％的硫酸.
3 拿出一个来测量和可称为配衡体的天平.
4 使用充填器称出1.625克的硫酸银
5 向已经稀释到20％的硫酸中注入大约200毫升的水
6 搅拌直到其溶解
7 用称重盘称出0.809克的重铬酸钾
8 用离心分离器将重铬酸钾转换为剩下的20％硫酸,倒入烧杯中
9在40°C的温度下（使用加热盘）搅拌直到其溶解
10 将温暖的试剂倒入量筒中
11关闭量筒并且给它贴上标签
12检查量筒使其不处于泄露状态
4.4试剂配方制作3（50克）
1将100毫升的量筒放上天平测量并且称出量筒重量
2用粉状漏斗填充器称出50克的蔗糖
3关闭量筒并且给试管贴上标签
累死了,