11. Conversion of ammonium thiocyanate to thiourea - reversible first-order reaction NH4SCN k1↔k2(NH2)2CS
The proportion of NH4SCN (а) that had reacted by the time t was experimentally estimated. Calculate the rates of the forward and reverse reactions using the following experimental data:
t, min 0 19 38 48 60 ∞
a,% 2.0 6.9 10.4 12.3 13.6 23.2

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