Difficult
Explain the dynamic nature of a chemical system in the laboratory using an activity.
(N/A) Activity: Take two $100 \ mL$ measuring cylinders (marked as $1$ and $2$) and two glass tubes,each of $30 \ cm$ length and the same diameter,also marked $1$ and $2$. Fill cylinder-$1$ with coloured water,such as a $KMnO_4$ (potassium permanganate) solution,and keep the second cylinder (number-$2$) empty.
Place one tube in cylinder-$1$ and the second in cylinder-$2$. The initial stage is shown in the figure.
By placing hollow tube-$1$ in cylinder-$1$,the tube will fill with the coloured water. Close the upper tip,take it out of the cylinder,and transfer the coloured water into cylinder-$2$. Repeat the process similarly by placing the hollow tube in cylinder-$2$ and transferring the coloured water from it to cylinder-$1$. Continue transferring the coloured water between cylinder-$1$ and cylinder-$2$ until the level of coloured water in both cylinders becomes constant. This demonstrates that even when the levels appear constant (equilibrium),the process of transfer is still occurring,representing the dynamic nature of equilibrium.
Place one tube in cylinder-$1$ and the second in cylinder-$2$. The initial stage is shown in the figure.
By placing hollow tube-$1$ in cylinder-$1$,the tube will fill with the coloured water. Close the upper tip,take it out of the cylinder,and transfer the coloured water into cylinder-$2$. Repeat the process similarly by placing the hollow tube in cylinder-$2$ and transferring the coloured water from it to cylinder-$1$. Continue transferring the coloured water between cylinder-$1$ and cylinder-$2$ until the level of coloured water in both cylinders becomes constant. This demonstrates that even when the levels appear constant (equilibrium),the process of transfer is still occurring,representing the dynamic nature of equilibrium.
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