投加NAOH 和HCL 调节PH 值,曝气量恒定。 1.3 试验及分析方法 通过接种污泥,选择间歇培养同步驯化的启动方法,MLSS 保持在5000mg/L 左右,HRT=3d,SV =36,F/M为0.144 kgBOD5/kgMLVSS.d, 容积负荷(FV) 为1.3～1.6 kgCOD/m3.d,温度28℃～30℃。试验维持进水氨氮浓度一定,首先 考察一个反应周期中 COD、NH3...
ANaOH溶液Na2CO3适量Ca(OH)2溶液、过滤 BCuOCu灼烧 CCaOCaCO3HCl DO2H2O干燥 A.AB.BC.CD.D 试题答案 在线课程 分析根据原物质和杂质的性质选择适当的除杂剂和分离方法,所谓除杂(提纯),是指除去杂质,同时被提纯物质不得改变.除杂质题至少要满足两个条件:①加入的试剂只能与杂质反应,不能与原物质反应;②反应...
Respiration was estimated as CO2evolution from the samples at 55% of water holding capacity after incubation in tight containers for 10 days at 25 °C by NaOH absorption followed by two-phase titration with HCl [38]. Hydrolase (HA) and dehydrogenase (DHA) activities were evaluated using fluores...
下列有关该物质的说法正确的是 A.分子式为( ₁₁ ₁₆ ₂ ₂ ₂ B.含有手性碳原子 C.含有3种官能团 D.1mol该物质最多可与6molNaOH反应 3.某溶液中存在较多的OH⁻、K⁺、CO₃ . ,该溶液中还可能大量存在的离子是 �. 2 4 − B.HCOO⁻C.NH₄ . ²⁺ 4.一种金属有...
Can NaOH and NaHCO_3 exist together in the same solution of water? Take in to account the fact that the amounts of the reagents being mixed need not be present in equal amounts. (To get started, write separate equations for dissolution of NaOH in water, a ...
Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 mol of KH_2PO_4, and enough water to make 0.500 L of solution. You are preparing 500 mL of Denaturation Buffer containing 1.5 M NaCl and 0.5 M ...
学习情境二工程一HCl溶液和NaOH溶液体积比的测定 学习目的学习目的任务义务任务义务知识预备知识预备实际操作实际操作 1 2 3 4 应知应会应知应会5 知识目的 1.了解滴定分析根本术语; 2.了解滴定分析法分类; 3.掌握滴定分析法对滴定反响的要求; 4.掌握滴定分析中常用的四种滴定方式的特点和适用范围。 才干目的 1...
Then, by using the molar ratio between KHP and NaOH (1:1), we can calculate the moles of NaOH used. Finally, by dividing the moles of NaOH by the volume of base used, we can calculate the concentration of the base. 3. To determine the moles of HCl needed to neutralize the given ...
图中“-”表示相连的物质在一定的条件下可以反应,“→”表示丁在一定条件下可以转化为乙.下表四组选项中符合图要求的是( )甲乙丙丁AH2SO4BaCl2NaOHNaClBBa(NO3)2K2CO3HClNaOHCFeCuCl2ZnHClDO2CO2CuOCA.AB.BC.CD.D 试题难度:难度:偏易 试题类型:单选题 试
The reaction was initiated by adding 80 μl 2 M NaOH and incubated for 15 min on ice. Subsequent dialysis against probe buffer (200 mM NaCl, 25 mM Tris [pH 7.5]) was performed using Slide-A-Lyzer Dialysis Cassettes (Thermo Scientific). Ub propargylamide (Ub-PA) and Cy5-labeled Ub-PA...