Iodine Clock Reaction Lab Report
Introduction
The purpose of this experiment is to determine the rate equation for the “Iodine Clock Reaction” experiment. The experiment will consider the equations 〖2I〗^-+S_2 O_8→2〖〖SO〗_4〗^(2-)+I_2 and I_2+2〖S_2 O_3〗^(2-)→2I^-+S_4 O_6 in order to determine the rate law of Rate=k[〖〖S_2 O_8〗^(2-)]〗^a 〖[I^-]〗^b by using the experimental data to calculate the values of exponents a and b as well as the rate constant k.
Experimental
Supplies Needed: 250 mL Erlenmeyer flask, 100 mL beaker, graduated cylinders for each reagent distributed, digital timer.
Reagents Needed: 0.4 mol 〖Na〗_2 S_2 O_3 / Liter, starch solution (freshly prepared), 0.2 mol 〖KNO〗_3 / Liter, 0.1 mol EDTA / Liter (in a dropping bottle), 0.2 mol (〖〖NH〗_4)〗_2 S_2 O_8 / Liter (prepared fresh), 0.2 mol KI / Liter.
Safety Precautions: Wear long pants, closed toed shoes, safety goggles, and gloves. Ingesting potassium nitrate or iodine is dangerous. …show more content…
The steps involve adding a given amount of (〖〖NH〗_4)〗_2 S_2 O_8 to the initial solution in order to induce the first reaction mentioned in the above introduction. Then in succession with the reaction (appearance of blue color), you add a given amount of 〖Na〗_2 S_2 O_3 to begin the second reaction mentioned in the above introduction. You alternate these steps seven different times while recording on a digital timer the times between adding the 〖Na〗_2 S_2 O_3 and the appearance of color (the reaction
The purpose of this experiment is to determine the rate equation for the “Iodine Clock Reaction” experiment. The experiment will consider the equations 〖2I〗^-+S_2 O_8→2〖〖SO〗_4〗^(2-)+I_2 and I_2+2〖S_2 O_3〗^(2-)→2I^-+S_4 O_6 in order to determine the rate law of Rate=k[〖〖S_2 O_8〗^(2-)]〗^a 〖[I^-]〗^b by using the experimental data to calculate the values of exponents a and b as well as the rate constant k.
Experimental
Supplies Needed: 250 mL Erlenmeyer flask, 100 mL beaker, graduated cylinders for each reagent distributed, digital timer.
Reagents Needed: 0.4 mol 〖Na〗_2 S_2 O_3 / Liter, starch solution (freshly prepared), 0.2 mol 〖KNO〗_3 / Liter, 0.1 mol EDTA / Liter (in a dropping bottle), 0.2 mol (〖〖NH〗_4)〗_2 S_2 O_8 / Liter (prepared fresh), 0.2 mol KI / Liter.
Safety Precautions: Wear long pants, closed toed shoes, safety goggles, and gloves. Ingesting potassium nitrate or iodine is dangerous. …show more content…
The steps involve adding a given amount of (〖〖NH〗_4)〗_2 S_2 O_8 to the initial solution in order to induce the first reaction mentioned in the above introduction. Then in succession with the reaction (appearance of blue color), you add a given amount of 〖Na〗_2 S_2 O_3 to begin the second reaction mentioned in the above introduction. You alternate these steps seven different times while recording on a digital timer the times between adding the 〖Na〗_2 S_2 O_3 and the appearance of color (the reaction