Interestingly, biocrusts (largely alkaline with pH 6.8–8.218) that mainly provide fixed N to desert soils also emit large amounts of HONO18,19, known to form under acidic conditions because acid–base dissociation constant of HONO is pKa = 3.321,22. This puzzle motivated our investigation...
Interestingly, boric acid is a weak acid with a pKa of 9.24, which is very close to that of NH3 (pKa = 9.25), making it largely exist as uncharged H3BO3 at physiological pH (33). The structure of boric acid is comparable with that of NH3, with the central boron atom possessing ...
这个题根据缓冲溶液计算公式啊PH=pKa+lg(C(NH3)/C(NH4+)),则10=9.26+lg(C(NH3)/C(NH4+))得出需要NH4CL 65.4克 APP内打开 为你推荐 查看更多 若配制pH=10.00,cNH3+cNH4+=1.0 mol·L-1的NH3- NH4Cl缓冲溶液1.0L,问需要15 mol·L-1的氨水多少毫升 第一排的公式是死的,pH与浓度的关系,把数据带进...
f = 1/(10(pKa-pH)+ 1) 6. Calculations f = [NH3.HOH]/([NH4+] + [NH3.HOH]) = (un-ionized ammonia, mole/L)/(total ammonia, mole/L) where f is actually the mole fraction of un-ionized ammonia. Concentration units other than mole/L can be used to describe both un-ionized amm...
已知NH3水的pKb = 4.75,H2CO3的pKa1= 6.38、pKa2 =10.25,欲配制pH = 9.00的缓冲溶液,可选择的缓冲对是A.NH3-NH4ClB.H 2 CO 3 - NaHCO 3C.NaHCO 3 - Na 2 CO 3D.H 2 CO 3 - Na 2 CO 3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
The diaqua adduct has unusually low pKa values which have been rationalised by molecular modelling. (漏 Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)Anna C. G.DepartmentHotzeDepartmentYuDepartmentChenHughesTrevor W.DepartmentHambley...
pKa of Acids & Functional Groups | Overview & Examples from Chapter 13 / Lesson 7 41K Explore the concepts of pKa and pH values and how they relate to acids and bases. Learn the trends in pKa value for functional groups, acids, and bases with examples. Related...
The pOH of ammonia buffer is: pOH=pKb+logsaltbase. pH=14.0−pOH. Answer and Explanation: The given data is: The concentration of NH3 is 0.18M. The concentration of NH4Cl is 0.22M. The value of pKb of...Become a member and un...
Equilibrium and Kinetic Studies of the Aquation of the Dinuclear Platinum Complex [trans-PtCl- (NH3)2]2(碌-NH2(CH2)6NH2)]2+: pKa Determinations of Aqua Ligands via 1H,15N-NMR Spectroscopy. Inorg. Chem. 2000, 39, 1710-1715.Davies M S,Cox J W,Berners-Price S J,Barklage W,Qu Y,...
Suppose 25 mL of a 0.300 M HCHO2 solution is titrated with a 0.100 M KOH solution. The Ka value is 2.8 x 10-6. What is the pH after 75 mL of KOH has been added? Suppose 25 mL of 0.300 M HCHO2 is titrated with 0...