【Daily Question】Theoretical Foundation 2020.07.30
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This post was last edited by Qingse Nianhua on 2020-7-30 08:11. Multiple-choice question: At a certain temperature, which of the following systems is a buffer solution? A. 0.100 mol.dm-3 NH4Cl solution; B. 0.100 mol.dm-3 NaAc solution; C. A solution obtained by mixing 0.400 mol.dm-3 HCl with 0.200 mol.dm-3 NH3.H2O in equal volumes; D. A solution obtained by mixing 0.400 mol.dm-3 NH3.H2O with 0.200 mol.dm-3 HCl in equal volumes. Answer: D. Hint: An additional reward will be given to those who can explain the reasoning behind the answer; the answer can be found in the replies
Solution obtained by mixing equal volumes of 0.400 mol.dm-3 NH3.H2O and 0.200 mol.dm-3 HCl
A Solution of a weak acid or weak base and its salts