Lead Iodide Lab

Lead compounds have been released into the atmosphere for many years, which rested into the soils. In this lab, the amount of lead in the contaminated soil will be determined using stoichiometry. The five objectives include: comparing the amount of lead in the contaminated soil with researched information; calculating the amount of lead (II) nitrate present in the contaminated soil; calculating the amount of lead present in the original contaminated sample; filtering out the solid precipitate; and measuring the actual yield of lead (II) nitrate, percent composition of lead, percent error in producing lead (II) nitrate, predicting the limiting reactant and theoretical yield of lead iodide. In order to complete the objectives, the sand and the

parts per million of lead. If contaminated soil has 700 parts per million (700 mg/kg) to 1500 parts per million (1,500 mg/kg) of lead, the soil is considered dangerous for unborn children when large amounts are carried into homes by tracking or airborne dust according to the US EPA. Therefore, the sand used in this experiment is not hazardous. The actual yield of the lead (II) iodide is 0.0308g which was found by subtracting the mass of the filter paper from the mass of the filter paper with the precipitate. The percentage of lead in the lead (II) nitrate is 62.56% which was found by dividing the total mass of lead (II) nitrate by the total mass of lead. The theoretical yield of the lead (II) iodide is 0.0362g which was found by dividing the actual yield of lead (II) iodide by

In stoichiometry and this lab, proportions or mass ratios are used to find the quantitative relationships between the reactants and products. Another topic that relate to this lab is the limiting reaction. Stoichiometry was used to find the limiting reaction of this reaction lab through proportions and conversions, which was lead (II) nitrate. Additionally, the excess reactant is another topic that relates to this lab. Stoichiometry was used to find the excess reactant which was potassium iodide. Another topic mentioned was the actual yield. The actual yield was used for lead (II) iodide. This data can be compared to the theoretical yield to find how well the experiment was performed. Additionally, the theoretical yield was used in this lab in order to find the percent yield. Another topic was the percent yield. The higher the percent yield, the better the experiment was performed. Another topic was double replacement. In the experiment the reactants are made of two elements that yields products which have been double replaced. In addition to the previous topics, uncertainty is another topic repeatedly used throughout the lab. The uncertainty is used during measurements to account for the room of error that was possibly made during the measurements. Molar mass was another topic that relates to the lab. In the proportions and conversions part of the lab, molar mass is used to correctly balance the