Answer to Question #106717 in Organic Chemistry for Rabi Ibrahim

Question

10 grams of solid iodine was mixed with 8 centimetre cube of ethanol and 2.5 grams remained and dissolved after thorough stirring for 5 minutes determine the rate of reaction in kilogram per decimeter cube

Answer 1

1) $\Delta m = 10-2.5 = 7.5 g$

$7.5 g (\frac{1 kg}{1000 g}) = 7.5 \times 10^{-3} kg$

2) $8 cm^3 (\frac{1 dm^3}{1000 cm^3} )=8\times 10^{-3} dm^3$

3) $Rate = \frac {\Delta m}{V \times \Delta t} = \frac{7.5\times10^{-3} kg}{8\times10^{-3} dm^3\times 5 min}= 0.19 \frac{kg}{dm^3\times min}$