The Henderson-Hasselbalch is especially useful to estimate the pH of a buffer solution. pH=pKa+log[base][acid]. Answer and Explanation: {eq}\text{At a pH of 7.40 the ratio will be} CO_3^{-2} to HCO_3^{-}\ K_a =4.7\times 10^{-11}\ pK_a=-log\left[K_a\r...
What are the products of the hydrolysis of NH4Cl? Do the following products below form when HCl (acid) reacts with CaCO_3 (limestone)? Explain why or why not for each answer. a) O_2 (g) b) NaCl (aq) What is the conjugate base of the Bronsted-Lowry acid HCOOH?
Tris is also called tris base. As a weakly alkaline solution, it has a pKa of 8.1 at 25 °C. Its effective buffer pH range is between 7.0-9.2, and the pH of the prepared aqueous solution is around 10, and its pH is often adjusted by adding hydrochloric acid. During experiments, it...
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某混合物在一常压连续精馏塔进行分离 .进料中轻组分A含量为0.4（mol分率，下同）流量为100Kmol/h，要求塔顶馏出液中含A0.9，A的回收率不低于0.9.泡点进料，取回流比为最小回流比的1.5倍，塔釜间接蒸汽加热.且知系统的相对挥发度为α=2.5.设计时，若改用饱和蒸汽进料，仍用第三小题中所用...
Chemistry is the branch which deals with the detailed study of matter, its properties, how and why atoms/substanced combine or separate to form other substances. Understand all the basic concepts of Organic, Inorganic, and Physical Chemistry with detaile
Which buffer system is the best choice to create a buffer with pH = 9.00? A. HF/KF B. HNO_2/KNO_2 C. NH_3/NH_4Cl D. HClO/KClO What is the pH of a buffer system that contains 0.24 M NH4+ and 0.12 M NH3? The pKa of NH4+ is 9.25. ...
Given, pKa = 3 Concentration of solution = 0.001 M pKa=−logKa3=−logKaKa=Antilog(−3)=0.001 Let the acid is HA {eq}\rm...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...
根据《企业职工带薪年休假实施办法》规定，用人单位经职工同意不安排年休假或者安排职工休假天数少于应休年休假天数的，应当在本年度内对职工应休未休年休假天数，按照其日工资收入的( )支付未休年休假工资报酬，其中包含用人单位支付职工正常工作期间的工资收入。
C. NaHCO3 D. NaHCO3-Na2CO3 E. NaOH- NaHCO3 查看完整题目与答案 同一NaOH溶液分别滴定相等体积的H2SO4和HAc溶液,消耗NaOH体积相等,说明H2SO4和HAc溶液的()。 A. 氢离子浓度相等 B. H2SO4和HAc浓度相等 C. H2SO4浓度为HAc的1/2 D. H2SO4和HAc的电离度相等 E. 不能确定 查看...