Table 1.

Concentration profiles of A and B for the reversible reaction A ⇄ B, from two different initial conditions.

Experiment	Substance	Concentration Profile
1st experiment, from pure A.	A	${\mathrm{A}}_{\mathrm{A}}\left(\mathrm{t}\right)=\frac{{\mathrm{k}}^{+}{\mathrm{e}}^{-\left({\mathrm{k}}^{+}+{\mathrm{k}}^{-}\right)\mathrm{t}}+{\mathrm{k}}^{-}}{{\mathrm{k}}^{+}+{\mathrm{k}}^{-}}$
	B	${\mathrm{B}}_{\mathrm{A}}\left(\mathrm{t}\right)=\frac{{\mathrm{k}}^{+}\left(1-{\mathrm{e}}^{-\left({\mathrm{k}}^{+}+{\mathrm{k}}^{-}\right)\mathrm{t}}\right)}{{\mathrm{k}}^{+}+{\mathrm{k}}^{-}}$
2nd experiment, from pure B.	A	${\mathrm{A}}_{\mathrm{B}}\left(\mathrm{t}\right)=\frac{{\mathrm{k}}^{-}\left(1-{\mathrm{e}}^{-\left({\mathrm{k}}^{+}+{\mathrm{k}}^{-}\right)\mathrm{t}}\right)}{{\mathrm{k}}^{+}+{\mathrm{k}}^{-}}$
	B	${\mathrm{B}}_{\mathrm{B}}\left(\mathrm{t}\right)=\frac{{\mathrm{k}}^{-}{\mathrm{e}}^{-\left({\mathrm{k}}^{+}+{\mathrm{k}}^{-}\right)\mathrm{t}}+{\mathrm{k}}^{+}}{{\mathrm{k}}^{+}+{\mathrm{k}}^{-}}$