Incubations were stopped at distinct time intervals by addition of either 0.5 mL of a 1 M NaOH solution (for incubations with bicarbonate) or 4 mL of a 20% zinc acetate solution (for incubations with acetate). Tubes were stored at −20 °C until further processing. For ...
1.Methods Thecold atomic absorption spectroscopywas used to determine the survival mercury after the reaction between excessive Hgcl 2 and S 2 .方法 用过量定量的HgCl2 与S2 -反应 ,冷原子吸收法测定残余汞量 ,从而间接测定空气中硫化氢含量。 2.0 mm bycold atomic absorption spectroscopy(AAS).冷原子吸...
站合、雨棚限界应建立定点检测、点间观测的监控制度,对突变位置要选择最不利点并适当增加检测点密度且不大于()m设置一个检测点,对《铁路技术管理规程》规定的特征点必须测量,检测点编号设置顺序应与列车运行方向相反。
C. Cl2+2NaOH===NaCl+NaClO+H2O D. NaClO+HCl===NaCl+HClO 查看完整题目与答案 使用哪组试剂,可鉴别在不同试剂瓶内的1—乙烯,甲苯的丙醛( ) A. KMnO4酸性溶液和溴的CCl4溶液 B. 银氨溶液的溴的CCl4溶液 C. FeCl3溶液和银氨溶液 D. 银氨溶液和KMnO4酸性溶液 查看完整题目与答案 小...
20FT T50 Liquid Chlorine Isotank ContainerCl2 Un1017 Max Storage Pressure 1.5MPa 21670L 20FT 20000liters Stainless Steel Nitric Acid Hno3, Hf Acid, Naoh Sodium HydroxideISO Tank ContainerSS30408 20 Feet Q235B+PELinging Acid Sodium S...
已知长方体的一个顶点上的三条棱长分别是 ,且它的8个顶点都在同一个球面上,这个球面的表面积为125π 则该球的半径为( )
C. 若分别用等浓度的NaOH溶液完全中和,所得溶液的pH:甲≤乙 D. 若分别与5mlpH=11的NaOH溶液反应,所得溶液的pH:甲≤乙 查看完整题目与答案 洗涤BaSO4固体中吸附的Na+和Cl—,最好用下列试剂中的 A. BaCl2溶液 B. 稀H2SO4 C. Na2SO4溶液 D. 蒸馏水 查看完整题目与答案 ...
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下列溶液中,跟200mL0.5mol/L的Na2SO4溶液所含的Na+物质的量浓度相同的是( ) A.200mL0.25mol/LNaCl溶液 B.200mL1mol/LNaCl溶液 C.100mL 0.5mol/LNaOH溶液 D.100mL1mol/LNa2CO3溶液 查看完整题目与答案 高中化学>物质的量浓度考试题目 When asked___ they needed most, the kids said the...
For Al foil reacting with a low alkaline NaOH aqueous solution, its oxidation process was fitted with the linear–parabolic growth model describing the surface reaction step and diffusion step [50]. In the study [51], the reaction between flat Al chips and NaOH solutions was described with ...