DETERMINATION OF MINERAL ACIDS CONCENTRATION FROM MIXTURES BY CONDUTOMETRIC TITRATION

Abstract

In this study, a conductometric titration method is proposed for the quantitative determination of two mineral acids (HCl and H3PO4), both individually and from mixture. Conductometric titration assumes the experimental measuring of electrical conductivity of the analyzed solution as a function of added titrant volume, and depends by the concentration of all ions present in this solution. A solution of AgNO3 (0.1 N) was used as titrant. Both mineral acids react with AgNO3 and form low soluble compounds (AgCl and Ag2HPO4), and these reactions are the basis of their determination by conductometric titration. If, HCl can be analyzed in this way with high accuracy, regardless of whether is in mixture or not, the determination of H3PO4 acid is more difficult due to the high solubility of Ag2HPO4 precipitate. Thus, the neutralization of H3PO4 acid with NaOH (0.1 N) solution before to start the conductometric measurements is necessary, for that his quantitative determination to be possible. Therefore, the conductometric titration with AgNO3 can be used for the determination of HCl and H3PO4, both individually and from mixtures, but this is possible only after neutralization of the mineral acids with a strong base solution.

Authors and Affiliations

MONICA-MARIA ROMAN, IONELA CIURDEA, CRISTINA LAZAREV, LAURA BULGARIU

Keywords

Related Articles

Remediation of Aqueous Solutions Containing Zn(II) Ions by Using Wastes of Abies Alba Bark

Batch sorption capability of Romanian Abies alba bark wastes for the removal of Zn(II) ions from diluted aqueous solutions has been investigated as function of initial pH, sorbent dose, metal ion concentration, temperatu...

NOVEL FURAN DERIVATIVES FROM 1-(4-CHLOROPHENYL)-3-(FURAN-2-YL)PROP-2-EN-1-ONE THROUGH ADDITION AND RING CLOSURE REACTIONS

Starting from a furan-containing chalcone analogue, a series of furan derivatives have been prepared. Addition of 4-chlorothiophenol to this chalcone analogue afforded the corresponding β-arylmercapto ketone, which has b...

AZO-POLYMERS – PHOTOCROMIC BEHAVIOUR STUDIES

Understanding the response to illumination at molecular level and characteristics of azo-materials features the key to new bio-science applications and not only. Although a number of mechanisms have been proposed, the en...

Applications of Reaction Calorimetry in Lignin Chemistry

he thermodynamic properties of lignin and its solutions are important in the design and operation of the machines used in the biomass biorafination schemes. In the literature, there are few thermodynamic data on the main...

Download PDF file
  • EP ID EP200409
  • DOI -
  • Views 80
  • Downloads 0

How To Cite

MONICA-MARIA ROMAN, IONELA CIURDEA, CRISTINA LAZAREV, LAURA BULGARIU (2016). DETERMINATION OF MINERAL ACIDS CONCENTRATION FROM MIXTURES BY CONDUTOMETRIC TITRATION. BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA, 62(2), 21-31. https://europub.co.uk/articles/-A-200409