are given in the table for reactions at 0 °C and 1 HCIO4. Explain the differences in the rate constants in terms of the probable mechanism of the reaction. X- F- CI- Br NCS- CrX²++ *Cr²+→ *CrX²+ + Cr²+ (*Cr is radioactive 51 Cr) N3™ k (M-¹ s-¹) 1.2 x 10-³ 11 60 1.2 x 10-4 (at 24 °C) > 1.2

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12.21 The rate constants for the exchange reaction
are given in the table for reactions at 0 °C and 1 HCIO4. Explain the
differences in the rate constants in terms of the probable mechanism of
the reaction.
X-
F-
CI-
Br
NCS-
CrX²++ *Cr²+→ *CrX²+ + Cr²+
(*Cr is radioactive 51 Cr)
N₂™
k (M-¹ S-¹)
1.2 x 10-³
11
60
1.2 x 10-4 (at 24 °C)
> 1.2
Transcribed Image Text:12.21 The rate constants for the exchange reaction are given in the table for reactions at 0 °C and 1 HCIO4. Explain the differences in the rate constants in terms of the probable mechanism of the reaction. X- F- CI- Br NCS- CrX²++ *Cr²+→ *CrX²+ + Cr²+ (*Cr is radioactive 51 Cr) N₂™ k (M-¹ S-¹) 1.2 x 10-³ 11 60 1.2 x 10-4 (at 24 °C) > 1.2
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