安全业务检查由区域品质管理部安全专员联合或授权各城市公司品质管理部安全专员共同组成检查小组,每半年进行一次覆盖区域内所有项目的检查,采取( )相结合的形式进行,暗访须组织多波次、多方位的突破测试,要求覆盖安全防范的各个关键时段。 A. 明查 B. 暗访 C. 一般性检查 D. 阶段性检查 查看完整题目与答案 ...
The lower the pKa, the stronger the acid and the greater its ability to donate protons. The pH depends on the concentration of the solution. This is important because it means a weak acid could actually have a lower pH than a diluted strong acid. For example, concentrated vinegar (acetic ...
Combined with anionic polymer at pH greater than pKa of polymer; simultaneous addition; improved paper filler and short fiber retentiondoi:US20040171719 A1A starch composition is made by cooking a starch and combining the cooked starch with a polymer, the polymer containing anionic groups or ...
Consider a buffer solution where conjugate base greater than weak acid, how is pH related to pKa? p-Nitrophenol and 2,6-dimethyl-4-nitrophenol both have pK_a = 7.15, but 3,5-dimethyl-4-nitrophenol has pK_a = 8.25. Why is 3,5-dimethyl-4-nitrophenol so much less acidic?
Suppose that the concentration of H+ in Solution #1 is 10,000 times greater than in Solution #2. What can you conclude about the difference in pH of these two solutions? Suppose that the concentration of H+ in solution 1 is 10,000 times greater than solution 2. What can you co...
Mutant tumors demonstrate a statistically greater mean score.When considering wild-type tumors, a count of 61 was observed, contrasted with 33 in other types.A p-value of less than 0.00001 was observed in the test.In a real-world setting, the largest evaluation of homologous recombination ...
The lyophilized antibody is stable at room temperature for at least one month and for greater than a year when kept at -20℃. When reconstituted in sterile pH 7.4 0.01M PBS or diluent of antibody, the antibody is stable for at least six weeks at 2-4 ℃备注: 本产品仅供研究实验使用,不...
Combination of CalA and FSK produced a dramatically greater responses than those of the individual drugs alone, indicating an additive effect as summarized in the quantification histogram (inset). β-actin was used as loading control. Experiments were repeated at least three times. C HT-29 cells ...
the quantitative behaviour of acids and bases in solution can be understood only if their pka values are known. in particular, the ph of a solution can be predicted when the analytical concentration and pka values of all acids and bases are known; conversely, it is possible to calculate the...
某二元弱酸H2A的pKa1=1.2,pKa2=4.2。欲使HA-为主要存在形式,则需将溶液pH控制在( )A.<1.2B.1.2-4.2C.>4.2D.>5.2的答案是什么.用刷刷题APP,拍照搜索答疑.刷刷题(shuashuati.com)是专业的大学职业搜题找答案,刷题练习的工具.一键将文档转化为在线题库手机刷题,以提高学习效率,