Question

1. The solubility of a gaseous solute in water is by an increase in pressure. Increased decreased not affected 2. A supersaturated solution may be prepared by slowly cooling down a solution saturated at an elevated temperature. TRUE FALSE 3. A dilution is a solution made by adding a solvent to a supersaturated solution. TRUE FALSE 4. When sugar & water are mixed, a clear liquid results. In this scenario, the sugar is considered a Solute Solution Solvent All of the above None of the above 5. In order to prepare a solution of a precise concentration, the common approach is as follows. Sample of solid with its mass determined on an analytical balance, is first dissolved in a small amount of water (about 1/10th of the total volume of the flask) in a beaker, this concentrate is added to a graduated flask of certain volume, then traces of the solute in the beaker are washed out into the flask with additional small portions of water. Finally, water is added up to the etched ring graduation mark. The volume is indicated on the flask label as a whole round number, but, if filled correctly, the volume is known up to at least 2 decimal digits. What is the molar concentration of KCI in a solution prepared by dissolving 0.3471 g KCl to which water was added to fill a 100 mL graduated flask. Show your calculations, 0.003471 M 0.0466 M 3.471 M 4.66 M