Simultaneous Solubility of Sodium and Potassium Chlorides in Alkali Hydroxide Aqueous Solutions

DOI Web Site

Bibliographic Information

Other Title
  • 各種濃度の水酸化アルカリ水溶液中の塩化ナトリウム, 塩化カリウムの同時溶解度
  • カクシュ ノウド ノ スイサンカ アルカリ スイヨウエキ チュウ ノ エンカ ナトリウム , エンカ カリウム ノ ドウジ ヨウカイド

Search this article

Description

The simultaneous dissolution of sodium and potassium chlorides into sodium hydroxide aqueous solutions of below 48 wt% was experimentally made under the atmospheric pressure of 5.5-70°C. This was made to determine their compositions when the aqueous solutions were saturated by the both chlorides. The results thus obtained served to make clear the following points:<BR>1. It is possible to calculate from the equilibrium data the differential enthalpy and entropy changes in the solution of sodium and potassium chlorides simultaneously saturated in the alkali hydroxide aqueous solutions.<BR>2. In case sodium and potassium chlorides are either simultaneously or separately saturated in the aqueous solutions having the same concentration of hydroxide ion in (1) the NaOH-KOH-NaCl-KCl-H2O system,(2) the NaOH-NaCl-H2O system, and (3) the KOH-KCl-H2O system, the differential enthalpy and entropy changes for the dissolution of the chloride in the (1) systems are larger than those for the same chloride in the systems of (2) and (3). In the aqueous solutions having sufficiently high concentration of hydroxide ion, however, the differences between the thermodynamic values showed a decline.<BR>3. In case sodium and potassium chlorides are saturated in the systems of (1),(2), and (3), the differential enthalpy and entropy changes,ΔH and ΔS, of the chlorides can be expressed as a function of the total ionic concentration.CT. I, by<BR>4. In case sodium and potassium chlorides are added into the alkali hydroxide aqueous solutions, the possible behaviors of the chlorides can be presumed from the equilibrium data.

Journal

Details 詳細情報について

Report a problem

Back to top