Determining Stoichiometry of the Reaction between Sodium Hypochlorite and Potassium Iodide, Lab Reports of Chemistry

Download Determining Stoichiometry of the Reaction between Sodium Hypochlorite and Potassium Iodide and more Lab Reports Chemistry in PDF only on Docsity! Experiment 5: Stoichiometry Thomas Rohrbaugh 2-15-08 Shengliang Zhao Objective: - To determine the stoichiometry of the reaction between sodium hypochlorite(NaClO) and potassium iodide(KI) in aqueous solution. Experimental Data: - Initial temperature of NaClO solution: 18.20 ⁰C - Initial temperature of KI solution: 18.04 ⁰C Volume of NaClO (mL) Volume of KI (mL) Temp. of NaClO (⁰C) Temp. of KI (⁰C) Final Temp. (⁰C) 45.0 5.10 18.20 18.04 20.77 40.2 10.0 19.39 18.58 25.37 35.1 15.0 19.11 18.60 24.91 29.9 20.0 18.74 18.43 23.69 25.1 25.0 18.95 18.40 23.08 20.1 29.9 19.34 18.57 21.99 15.1 35.0 19.41 18.74 20.37 10.1 40.1 19.35 18.32 20.05 5.0 45.0 19.80 18.97 18.94 Sample Calculations: - Mole Fraction of NaClO: = Volumeof NaClO Volumeof NaClO+volumeof KI = 45.0 45.0+5.10 =0.898 - Calculating Initial Temperature: ¿ (T1V 1 )+(T 2V 2 ) V 1+V 2 = (18.20∗45.0 )+(18.04∗5.10 ) 45.0+5.10 =18.2℃ - Change in Temperature: =20.77℃−18.2℃=2.57℃ - Moles of Reactants: =0.79¿ a a+b = 40 40+10