In this lab, Lab 4.3 Comparing Concentrations of Saturated Solutions, we aim to find and compare the solubilities of two solids in water. Furthermore, we tested whether solubility is a characteristic property of a solid in a given liquid. This laboratory allowed us to test and use a reliable method for measuring the solubility of a solid. This lab can be replicated for any solid with the same procedure, so it gives us a method to calculate solubility. The two solids we tested in this experiment were NaCl (sodium chloride) and NaNO3 (sodium nitrate). To begin the experiment, we measured 5 cc of water and 5 g of NaCl and added them to a test tube. Next, we capped the tube and shook vigorously for two to three minutes. After observing that the solution was saturated, we stacked an evaporation dish (18.89 g) and poured most of the solution into it, being careful not to spill any undissolved solids into the dish. Next, we filled the evaporation plate with the solution and found it to be 23.32 g. The next step was to slowly evaporate the solution in the evaporating dish using a hot plate. Once the liquid had evaporated from the solution, to the best of our ability, we piled the remaining solid into the dish, which we found to be 20.32 g. This was the last step of the physical part of the experiment and we proceeded with the calculations. First, we found the mass of the remaining solid by subtracting the mass of the evaporation plate from the mass of the solid and the evaporation plate, which we found to be 1.43 g. To find the mass of the evaporated water we subtracted the mass of the solid and evaporating plate from the mass of the solution and the evaporating plate, which we found to be 3 g. Since the density of water is 1 g/1 cc, the mass is... half the paper..., the dissolved substance, in a given solvent, the substance that dissolves. Solubility is a characteristic property of a given solid in a given liquid and when the solubility of a solid is reached the solution is considered saturated. A saturated solution is a solution in which the maximum amount of solute has been dissolved in the solvent and no more solute can be dissolved. Also, in lab 4.1 we incrementally added the solid until the solution was saturated and noted when it was saturated but did not find the solubility of the solid. In contrast to lab 4.1, in lab 4.3 we started with a saturated solution and then removed the water, resulting in the maximum amount of solid per volume of liquid otherwise known as solid solubility. In conclusion, Lab 4.3 allowed us to find the accurate solubility of two solids and provided us with a method for finding the solubility of a solid.