1.25M NaOH means that in the solution there are Ma(2-) and HMa- only. Simple stoichiometry gives [HMa-] = 0.25 and [Ma(2-)] = 0.5 HH equation: pH = pKa2 + log([Ma(2-)]/[HMa-]) rearranging: pKa2 = pH + log([HMa-]/[Ma(2-)]) using calculator: pKa2 = 6.03 + log(0...
-7-2 用0.1000 mol/LNaOH滴定0.1mol/L的三元酸(pKa1=2,pKa2=6,pKa3=12)溶液时,可直接滴定至酸的质子全部被中和。 A. 错误 B. 正确 查看完整题目与答案 打赢蓝天保卫战,必须坚持源头防治,大力推进能源清洁高效开发利用,提高能源利用效率。总的来说() A. 产业结构绿色转型升级 B. 能源结构...
Approximately 7% of all reported tuberculosis (TB) cases each year are recurrent, occurring among people who have had TB in the recent or distant past. TB recurrence is particularly common in India, which has the largest TB burden worldwide. Although pat