Stoichiometry - Stoichiometry Objective: The purpose of...

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Stoichiometry Objective: The purpose of this lab is to determine the stoichiometry of the reaction between sodium hypochlorite (NaClO) and potassium iodide (KI). Experimental Data: Volume of NaClO (mL) Volume of KI (mL) NaClO Temp (°C) KI Temp (°C) Final Temp (°C) 45.0 5.00 21.88 21.08 24.96 40.0 10.0 21.91 21.44 28.05 35.0 15.0 21.97 21.26 28.95 30.0 20.0 21.86 21.79 27.87 25.0 25.0 22.13 21.35 26.88 20.0 30.0 22.03 22.05 25.97 15.0 35.0 21.96 21.52 24.68 10.0 40.0 22.04 21.32 23.53 5.00 45.0 21.95 21.34 22.31 Sample Calculations: T(initial) = (T1*V1) + (T2*V2)/(V1+V2) (21.88 * 45) + (21.08 * 5)/(45+5) = 21.80 (°C) Mole Fraction of NaClO (volume of NaClO)/ (volume of NaClO + volume of KI) 45mL/45ml + 5ml = 0.90 T= T(final) – T(initial) 24.96(°C) – 21.80 (°C) = 3.16(°C) “a” and “b” aNaClO + bKI a= 1 b=2
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Results and Conclusions: The mole ration is 2/(2+1) = 0.67 and the equation is NaClO +2KI +H20 -> I2 + NaCl + 2KOH. Discussion of Uncertainty
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This note was uploaded on 04/02/2008 for the course CHEM 1045 taught by Professor Pgamateis during the Fall '08 term at Virginia Tech.

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Stoichiometry - Stoichiometry Objective: The purpose of...

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