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General Chemistry 2: Rates of Reaction

Consider a solution of 0.10 M H+^{+} in 0.10 M thioacetimide at 25 ^\circC

rate = k[H+^{+}][CH3_3CSNH2_2]

How are the rate and the rate constant (k) effected when water is added to the solution? When the reaction is heated to 75^\circC ? When NaOH is added?

Derive the rate law given the elementary steps.

Cl2 k1k1 2 Cl  1Cl_2~\mathop{\leftrightharpoons}^{k_1}_{k_{-1}}~2~Cl~~{1}

Cl+ CHCl3 k2 HCl + CCl3  2Cl+~CHCl_3~\xrightarrow{k_2}~HCl~+~CCl_3~~{2}

Cl + CCl3 k3 CCl4  3Cl~+~CCl_3~\xrightarrow{k_3}~CCl_4~~{3}

For the proposed mechanism below, identify the intermediates and determine the rate law.

2 NO2 + F2  2 NO2F  overall2~NO_2~+~F_2~\leftrightharpoons~2~NO_2F~~{overall}

NO2F2+ Br2  NO2F + F  slowstepNO_2F_2+~Br_2~\longrightarrow~NO_2F~+~F~~{slow step}

NO2 + F  NO2FNO_2~+~F~\longrightarrow~NO_2F

For the proposed mechanism below, find the overall reaction, identify the intermediates, then determine the rate law.

CL2  2 ClCL_2~\leftrightharpoons~2~Cl

2 Cl +2 NO  2 NOCl2~Cl~+2~NO~\longrightarrow~2~NOCl