In this laboratory we worked with limiting and excess reagents. In this type of reactions, we are able to determine which reactant will be exhausted first. In this particular experiment, we worked with copper(III) nitrate and potassium iodide to determine which are the limiting and excess reactants. To calculate the efficiency of a reaction, chemists calculate the percentage yield, using the actual yield and the theoretical yield. The actual yield tells us the amount of product obtained after carrying out the reaction. Theoretical yield is the calculation of how much product you actually get. This ratio tells us the effectiveness of the reaction. Precipitation is the formation of an insoluble solid in a solution. We use a centrifuge to better separate the liquid and solid in the test tube. The centrifuge spins the test tube at high speed, causing it to separate and making the liquid less cloudy. To separate the liquid and solid, we extract the supernatant using a pipette and carefully remove the liquid so as not to disturb the precipitate. The objectives of this experiment were to determine the lim...