Volumetric Analysis

2021 ◽  
pp. 199-213
Author(s):  
Christopher O. Oriakhi
Keyword(s):  
Nitrogen Content ◽  
Volumetric Analysis ◽  
Volatile Substance ◽  
Acid Base ◽  
General Process ◽  
Acid Base Titration ◽  
Back Titration ◽  
Kjeldahl Method ◽  
Standard Solution ◽  
Reaction Stoichiometry

Volumetric Analysis describes the general process of quantifying acid-base reactions by titration in which the known concentration of one solution (often a standard solution) is used to determine the unknown concentration of another. Common terms are defined, and calculations involving acid-base titration based on the concept of reaction stoichiometry, number of moles, mole ratio and molarity are discussed. The treatment is then broadened to include calculations involving mass and percentage of substance titrated. Back (or indirect) titration, a method to determine the concentration of a volatile substance or an unknown solid that is insoluble or only partly soluble in water, is described. The Kjeldahl method of determining the nitrogen content in organic and inorganic samples is used to illustrate back titration.

Henderson Hasselbalch Relationship and Weak Acid Titration

2019 ◽  
Author(s):  
Marc Blétry
Keyword(s):  
Theoretical Framework ◽  
Weak Acid ◽  
Acid Base ◽  
Sensitive Technique ◽  
Chemistry Students ◽  
Advanced Students ◽  
Acid Titration ◽  
Acid Base Titration ◽  
Analytical Expressions

Henderson-Hasselbalch relation is generally the simplified theoretical framework used to introduce students to acid-base titration. However, it is not always valid and its limitations should be made clear to chemistry students. The appropriate parameter to evaluate its validity is K a /C 0 , in connection with Ostwald dilution law. For more advanced students, it is possible to deduce analytical expressions that always fit accurately acid-base titrations and allow an evaluation of Henderson Hasselbalch relation. Gran plot appears as a particularly sensitive technique to the breakdown of Henderson Hasselbalch relation.

Direct Synthesis of 3,5-Dinitropyrazole Catalyzed by Newly Sulfated Nanosolid Superacid TiO2/ SO

2011 ◽  
Vol 391-392 ◽  
pp. 1296-1301
Author(s):  
Li Min Xi ◽  
Xin Xin Zhang
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Acid Base ◽  
Direct Transformation ◽  
Acid Base Titration ◽  
Optimal Reaction Condition ◽  
Superacid Catalyst ◽  
Average Size ◽  
Optimal Reaction ◽  
Xrd And Tem

The newly sulfated nanosolid superacid TiO2/SO4 prepared by sol-gel method was broadly characterized by acid base titration, XRD and TEM, which identified that the superfine solid TiO2/SO4 showing good dispersibility with average size of 27 nm belongs to kind of crystalline nanoparticles. With the help of the catalyst TiO2/SO4, the optimal reaction condition for direct transformation of pyrazole and nitrosonitric acid into 3, 5-Dinitropyrazole was n (pyrazol)=0.10 mol, m (TiO2/SO4 )＝1.5g, V(n-octannol)＝90mL, and V(nitrosonitric acid)＝50mL. Moreover, the optimal yield of the catalytic reaction reached up to 59.4% when the reaction time is 7 hours. The nanosolid superacid catalyst is still of high activity after regenerating eight times by calcination at 600。C.

Acid-Base Titration Curves in Disproportionating Redox Systems

1994 ◽  
Vol 71 (8) ◽  
pp. 632 ◽  
Author(s):  
Tadeusz Michalowski ◽  
Andrzej Lesiak
Keyword(s):  
Redox Systems ◽  
Acid Base ◽  
Titration Curves ◽  
Acid Base Titration

scholarly journals Use of Argyreia cuneata Flower Extract as a Natural Indicator in Acid Base Titration

2014 ◽  
Vol 4 (2) ◽  
pp. 1124-1127 ◽  
Author(s):  
N.V.Pimpodkar . ◽  
B.S.Surve . ◽  
S.H.Bhise .
Keyword(s):  
Acid Base ◽  
Flower Extract ◽  
Acid Base Titration
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