(生成[Ag(NH3)2]+) A.9%NaCl,9.6%AgCl,现欲用1.0 点击查看答案进入题库练习 单项选择题 The word ’motel’means motorist hotel and is used chiefly by people traveling by car.Parking space is always available.Motels are usually located outside the center of town near major roads and are less...
What indicator should be used for the titration of HCl and KOH? The titration of 25.0 mL of 0.00 M base (B) by 0.500 M HCl for which the following data was collected. What is the pKb value for the base (B) titrated? How can you determine the concentration of solution after titration...
Henderson Hasselbalch Equation is an approximate equation that shows the relationship between the pH or pOH of a solution and the pKa or pKb and the ratio of the concentrations of the dissociated chemical species.Answer and Explanation: Ka=4.5×10−4.(given i...
点击查看答案 单项选择题 浓度为0.1 mol·L−1的下列酸或碱,能用NaOH或HCl直接滴定的是 A.HF (pKa=3.18) B.HCN (pKa=9.21) C.NaAc (HAc的pKa=4.74) D.NH4Cl (NH3的pKb=4.74) 点击查看答案 点击查看答案
如果被审计单位存在对其持续经营能力有重大影响的情况，但管理当局没有采取相应的改善措施，则注册会计师应当要求被审计单位在财务报表的附注中对有关情况作充分披露。假定被审计单位已按注册会计师的要求作了相应的披露，则应当( )。
In order to keep the pH of the solution stable, which buffer system listed bel... A. 0.1mol·L-1 HAc — 0.1mol·L-1 NaAc (pKa = 4.75) B. 0.1mol·L-1 NH3·H2O — 0.1mol·L-1 NH4Cl (pKb = 4.75) C. 0.1mol·L-1 NaH2PO4 — 0.1mol·L-1 Na2HPO4(pKa2=7.21 ) D. 0.1...
The HB turns out to be the result of the electromagnetic field gradient in the coherent phase of water, whose vacuum level is lower than in the non-coherent (gas-like) fraction. In this way, the HB can be properly considered, i.e., no longer as a “dipolar force” between molecules,...