W2002ExpF - page 13 of 19

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F-13

OBSERVATIONS SHEET - EXPERIMENT F

DETERMINATION OF THE IODINE-TRIIODIDE EQUILIBRIUM CONSTANT

NOTE: You must record all buret readings to 0.02 mL accuracy.

Initial concentration of I

(aq)

(from KI3 reagent bottle)

___________________M

Concentration of S2O3²

(aq)

______________ M

RoomTemperature

Part II Buret Readings: Titration of the aqueous layer of I

, I2 , I3

2(aq)

, I3

(aq)

) solution

Run 1

Run 2

Run 3

Final buret reading (mL)

Initial buret reading (mL)

Volume added (mL)

S2O3²

(aq)

Run 1

Run 2

Run 3

Final buret reading (mL)

Initial buret reading (mL)

Volume added (mL)

Ratio:

vol

titrant

vol

analyte

___________________________

_____________________________

_______________

Signature of Laboratory Instructor

Name of Student

Laboratory Section