On the use of dimensionless parameters in acid-base theory. II. The molar buffer capacities of bivalent weak acids and bases

1993 ◽  
Vol 14 (1) ◽  
pp. 202-204 ◽  
Author(s):  
Harry Rilbe
Keyword(s):  
Weak Acids ◽  
Acid Base ◽  
Dimensionless Parameters ◽  
Base Theory ◽  
Acids And Bases ◽  
Buffer Capacities

scholarly journals A simple theoretical, quantitative approach to help understand the titration of weak acids and bases

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Miguel Arocena
Keyword(s):  
Undergraduate Students ◽  
Weak Acid ◽  
Quantitative Approach ◽  
Weak Acids ◽  
Weak Base ◽  
Acid Base ◽  
Buffer Solution ◽  
Strong Base ◽  
Acids And Bases ◽  
Quantitative Treatment

Abstract What happens at the very beginning of the titration of a weak acid or base is a question sometimes asked by undergraduate students when introduced to the concept of buffer solution. To attempt to answer this question, a simple quantitative approach is developed, which also allows explaining more general properties of the weak acid or weak base titration process, while serving as well as an introduction to the theoretical, quantitative treatment of this subject. Using this approach, it can be shown that, at the beginning of the titration, the reaction between a weak acid (base) and a strong base (acid) does not occur on a one to one ratio when very small amounts of the strong base (acid) are added.

Neutral Blue, a New Indicator

1972 ◽  
Vol 55 (4) ◽  
pp. 896-897
Author(s):  
O P Srivastava
Keyword(s):  
Clear Indication ◽  
Weak Acids ◽  
Acid Base ◽  
End Point ◽  
Acids And Bases

A new indicator for acid-base titrations is reported. Neutral blue, isolated from an umbelliferous plant, is pink at pH 5.3 and below and blue at pH 7.1 and above. Just before the end point, the indicator turns purple and thins there is a clear indication of when it is being approached. Examples of titrations with strong and weak acids and bases are given.

Acid-base properties of metals and glasses of Na2O.P2O5-xB2O3 system

1984 ◽  
Vol 49 (10) ◽  
pp. 2355-2362 ◽  
Author(s):  
Juraj Leško ◽  
Marie Dorušková ◽  
Jan Tržil
Keyword(s):  
Boron Oxide ◽  
A Priori ◽  
Optical Basicity ◽  
Galvanic Cell ◽  
Acid Base ◽  
Tetrahedral Configuration ◽  
Relative Basicity ◽  
Base Theory ◽  
Base Properties

Boron oxide in the Na2O.P2O5-x B2O3 system behaves as a Lux base. Its addition to Na2O.P2O5 brings about transformation of a Co(II) indicator from octahedral to tetrahedral configuration, increase in the optical basicity ΛPb(II), increase in the relative basicity of the melt as determined by means of a galvanic cell, and depolymerization reactions releasing PO43- ions. In the Na2O-B2O3 system free of P2O5, boron oxide behaves as a Lux acid. The amphoretic nature of B2O3 is explained in terms of Lux's acid-base theory extended in analogy with the protolysis theory. The theoretical optical basicity values do not indicate the amphoretic behaviour of B2O3 because in this approach boron oxide is a priori regarded as more acidic than Na2O.P2O5.

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