The peroxydisulfate ion (S2O8-2) reacts with the iodide ion in aqueous solution via the reaction: S2O82-(aq) + 3I- → 2SO4(aq)+ I3-(aq). An aqueous solution containing 0.050 M of S2O8-2 ion and 0.072 M of I- is prepared, and the progress of the reaction followed by measuring [I-].  The data obtained is given in the table below. Time (s) 0.00 400.0 800.0 1200.0 1600.0 [I‑] (M) 0.072 0.057 0.046 0.037 0.029 Determine the average rate of disappearance of I- between 400.0 s and 800.0 s in M/s.     Determine the average rate of disappearance of I- in the initial 400.0 s in M/s.

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The peroxydisulfate ion (S2O8-2) reacts with the iodide ion in aqueous solution via the reaction: S2O82-(aq) + 3I- → 2SO4(aq)+ I3-(aq). An aqueous solution containing 0.050 M of S2O8-2 ion and 0.072 M of I- is prepared, and the progress of the reaction followed by measuring [I-].  The data obtained is given in the table below.

Time (s)

0.00

400.0

800.0

1200.0

1600.0

[I] (M)

0.072

0.057

0.046

0.037

0.029

  1. Determine the average rate of disappearance of I- between 400.0 s and 800.0 s in M/s.

 

 

  1. Determine the average rate of disappearance of I- in the initial 400.0 s in M/s.

 

 

  1. Determine the average rate of disappearance of I- between 1200.0 s and 1600.0 s in M/s.

 

 

  1. Determine the concentration of S2O82- remaining at 400 s in M.

 

 

  1. Determine the concentration of S2O82- remaining at 800 s in M.

 

 

  1. Determine the concentration of S2O82- remaining at 1600 s in M.

 

 

 

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