In the graphic, the first reaction shows citric acid producing hydrogen ions, therefore it is an acid. Bronsted-Lowery Definition (1923) - The definition of acids and bases involving hydrogen and hydroxide ions, respectively is much too limiting. A broader definition was proposed by Bronsted and Lowry in 1923. The main effect of the definition is to increase the number of substances that act as bases.
Although the solubility of a solid generally increases with increasing temperature, there is no simple relationship between the structure of a substance and the temperature dependence of its solubility. Many compounds (such as glucose and CH3CO2Na) exhibit a dramatic increase in solubility with increasing temperature.
The hypothesis that as the temperature of the water increases, the amount of substance dissolved in the water also increases is proven to be true. Solubility of a substance in a solvent can be increased or reduced by adding another substance.he hypothesis that as the temperature of the water increases, the amount of substance dissolved in the water also increases is proven to be true. Solubility of a substance in a solvent can be increased or reduced by adding another substance.