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同离子效应
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution…
缓冲液
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a…
亨德森-哈塞尔巴尔赫方程(Henderson-Hasselbalch Equation)
The ionization-constant expression for a solution of a weak acid can be written as: Rearranging to solve for [H3O+] yields: Taking the negative…
计算缓冲溶液中的 pH 值变化
A buffer can prevent a sudden drop or increase in the pH of a solution after the addition of a strong acid or base up to its buffering capacity;…
缓冲液效力
Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes…
酸-碱 滴定曲线
A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property…
滴定计算:强酸 - 强碱
Calculating pH for Titration Solutions: Strong Acid/Strong Base A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of…
滴定计算:弱酸 - 弱碱
Calculating pH for Titration Solutions: Weak Acid/Strong Base For the titration of 25.00 mL of 0.100 M CH3CO2H with 0.100 M NaOH, the reaction can be…
指标
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example,…
多质子酸的滴定
A polyprotic acid contains more than one ionizable hydrogen and undergoes a stepwise ionization process.  If the acid dissociation constants of…
溶解度平衡
Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many…
影响溶解度的因素
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution…
错合离子的形成
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a…
离子沉淀
Predicting Precipitation The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is: It is important to…
定性分析
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique…
高纯度对称 Dialkylphosphinic 酸萃取的合成
We present the synthesis of (2,3-dimethylbutyl)(2,4,4'-trimethylpentyl)phosphinic acid as an example to demonstrate a method for the synthesis of…
分离硫酸选择性结晶用双 -  iminoguanidinium配体
A simple and effective method for selective sulfate separation from aqueous solutions by crystallization with a bis-guanidinium ligand,…

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