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Chemistry of natural waters

T. Moutin & T. Wagener (L3)

Introduction

Starting with a theoretical course, based essentially on the theory of chemical equilibria to explain the composition of natural waters, and tutorials, students are encouraged to put their teaching into practice during 3 x 4h manipulations. This 40hour training course is rounded out by a 40hour course in analytical chemistry, including 2 x 4hour practical exercises, to provide students with the theoretical and practical foundations of natural water chemistry.

Lectures

Lectures (24 h) based on the theory of chemical equilibria to explain the composition of natural waters: origin of the chemical composition of natural waters, application of thermodynamic data, acids and bases (equilibrium calculations), precipitation and dissolution (solubility of hydroxides and carbonates), redox reaction (significance of potentials measured in natural waters).

Exercices

TD (8 h): Exercises on the main acid/base and redox reactions and solubility equilibria to be considered in natural waters. Log-log diagram.

Practical work (fascicule)

Practical work (12 h): Overall characteristics of water (pH, resistivity, ionic strength, activity coefficients), Calco-carbonic balance (TA, TAC, calcium), Complexometric and potentiometric titrations.

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Practical work room at the Endoume marine station.