As per lab manual, we weigh an evaporating dish, then place an unknown substance on it, and weigh it as well. From this, we calculate the sample’s weight. We then set the dish up over a burner and heat the sample until the white fumes it produces are no longer expelled. When the dish cools, we weigh it again and calculate the amount of NH4Cl that was present in the mixture, due the amount of weight lost. Following this, we add 25 mL of water to the solid present in the evaporating dish and mix it. We weigh another clean evaporating dish and a watch glass, then decant the liquid from the previous dish into the new, empty one. We continue to do this process until all the soluble NaCl is extracted from the sand. We will then heat the NaCl solution
