Determining the required amount of added solvent (H2O) to obtain a given electrolyte density

Problem. The article proposes a method for determining the required amount of water that must be added to obtain a given density of the electrolyte. Goal. The method of calculating the volume and mass of water necessary for diluting the electrolyte solution to a given density is considered. Methodology. This calculation allows, if necessary, to check the obtained results of measurements of the concentration of the electrolyte and to calculate the given density of the electrolyte taking into account the addition of the solvent (H2O). With periodic dosed replenishment of water consumed from the electrolyte, the electrolysis process occurs at a variable concentration of alkali in the electrolyte. Results. The proposed dependencies and the calculation method developed on their basis make it possible to increase the efficiency of the electrolysis process by reducing energy costs due to ensuring optimal specific conductivity of the electrolyte at a variable concentration of alkali. Originality. The resulting calculation dependence allows both during the development and operation of operating alkaline electrolyzers to calculate the current concentration and the range of changes in the concentration of alkali in the electrolyte. Practical value. The application of the obtained dependence for alkaline electrolyzers with periodic replenishment of feed water and for developed operating electrolyzers allows to analyze the nature of changes in the specific electrical conductivity of the electrolyte, i.e. evaluate the efficiency of the electrolysis process.