Lab Report Double Displacement Reaction

Introduction
The purpose of this lab was to find the theoretical and experimental percentage yields of the double displacement reaction between the solutions Lead (II) Nitrate (PbNO3) and Potassium Iodide (KI). It is important to obtain amounts of Lead (II) Nitrate and Potassium Iodide as close to 1.44g as possible. This reaction creates Lead (II) Iodide and Potassium Nitrate. The precipitate during this reaction is Lead (II) Iodide. The balanced equation is Pb(NO3)2 + 2KI= PbI2 + 2KNO3. In this lab the Lead (II) Iodide is separated from the solution and collected so it can be weighed for a mass. Potassium Nitrate is separated from the water by boiling the solution, this is resulting in evaporation. This lab is using chemicals and the Bunsen
1.44g of PbNO3 and 1.44g of KI were acquired. 2) Assemble filtration system. The filter paper was to be folded and inserted into the funnel. Seal the filter paper to the funnel by using water. The funnel was set into the flask. 3) The substances were dissolved in 25 ml of water in beakers. 4) The solutions were thoroughly mixed together and then poured through the funnel. This separated the precipitate from the filter. 5) Separate the precipitate from the filter and place into beaker. 6) Ignite the Bunsen Burner 7) Add 50ml of water to the precipitate. Place upon the Bunsen burner and wait for it to boil. 8) Set up another filtration system. Pour the boiling solution through the filter. The PbI2 can now pass through the filter paper because it is more soluble in its heated state. As the solution cools the crystals form in the purified state. 9) Repeat steps 5-8 to increase the yield. 10) Filter the purified solution. 11) Place the filter with the precipitate within the oven to
This forms two new substances, Lead (II) Iodide and Potassium Nitrate. The precipitate was PbI2. PbI2 is a yellow substance that is insoluble. In the lab the precipitate was boiled and the substance became soluble. This was caused by heat, it can increase the solubility of substances because when you boil the substance it can be formed into a liquid which makes it soluble. The percent yield of 2KNO was much higher than the percent yield of PbI2. The percent yield of PbI2 was 8.04% while the percent yield of 2KNO was 77.4%. The percent yield of Potassium Nitrate (2KNO) was considerably higher than the percent yield of Lead (II) Iodide (PbI2). This will be explained further in the error analysis section. During this lab the substances go through a process of separating, collecting and purifying. During that process the substances go from solids to a liquid then back to a solid. This is because the PbI2 has to become heated so it can be soluble enough to pass through the funnel. That was the separating process where the crystals are going to be separated from the solution. This cycle is repeated several times to get the best yield percentage possible. The crystals collected on the filter paper had to be placed into the drying oven so it can be turned back into a solid and able to be weighed for mass. That made this experiment very tricky and difficult because the goal was to