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Capítulo 16
Efeito de Ião Comum
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution…
Tampões
A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer. Buffer solutions resist a…
Equação de Henderson-Hasselbalch
The ionization-constant expression for a solution of a weak acid can be written as: Rearranging to solve for [H3O+] yields: Taking the negative…
Cálculo de Alterações de pH em uma Solução Tampão
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;…
Eficácia dos Tampões
Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes…
Curvas de Titulação Ácido-Base
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…
Cálculos de Titulação: Ácido Forte - Base Forte
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…
Cálculos de Titulação: Ácido Fraco - Base Forte
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…
Indicadores
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example,…
Titulação de um Ácido Poliprótico
A polyprotic acid contains more than one ionizable hydrogen and undergoes a stepwise ionization process.  If the acid dissociation constants of…
Equilíbrio de Solubilidade
Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many…
Factores que Afetam a Solubilidade
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution…
Formação de Iões Complexos
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a…
Precipitação de Iões
Predicting Precipitation The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is: It is important to…
Análise Qualitativa
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique…
Síntese de alta pureza da gravitação assimétrica Dialkylphosphinic ácido Extractants
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…
Separação sulfato por cristalização selectiva com um ligando bis-iminoguanidinium
A simple and effective method for selective sulfate separation from aqueous solutions by crystallization with a bis-guanidinium ligand,…

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