# Limiting Reactant Lab

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Limiting Reactant Lab Khalid Lakhdar- Azzouz Period 6 2/27/13 Problem Statement: Classify Reactants as being excess or limiting for the reaction between KI(Potassium Iodide) and Pb(lead). Hypothesis: If the group classifies reactants as being excess or limiting for the following reactions, then KI will be the limiting reactant. Materials: 1. 2 Beakers (One filled with KI and the other with Pb) 2. 3 pipettes 3. 8 test tubes Procedures 1 Take two beakers, one filled with KI and the other with Pb. 2. Take one pipette and fill each test tube with different amounts of KI 3. Take one pipette and fill each test tube with different amounts of Pb 4. Wait 20 minutes 5. Measure the height of the solid in each test tube.…show more content…
Repeat steps 1-5 for trial 2. Variables and Control test: Independent Variable: Amount of each reactant poured into the test tubes Dependent Variable: Height of each solution Constant variables: Amount of time waiting for solution Data Table: Test tube # | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Trial 1 | 0.5 cm | 1.0 cm | 1.1 cm | 1.5 cm | 1.5 cm | 1.5 cm | 1.3 cm | 1.5 cm | Trial 2 | 0.5 cm | 0.7 cm | 1.0 cm | 1.0 cm | 1.3 cm | 1.7 cm | 1.9 cm | 1.5 cm | Observation/Analysis: Solution turns yellow when a separate product is added, solid of the solution leaks down to the bottom after 20 minutes. Conclusion: The group tried to find the excess or limiting for the reaction between KI and Pb. In the end the hypothesis was supported by the data. We found that little amounts of each product led to a greater height of solids. Results from other groups vary, some received different heights but the limiting factor stayed the same. As KI was added to the solution less of a difference in height was recorded supporting the