(Solved): 1. Set up four test tubes labeled \( \mathrm{A}-\mathrm{D} \), each containing about \( 3 \mathrm{~ ...

1. Set up four test tubes labeled \( \mathrm{A}-\mathrm{D} \), each containing about \( 3 \mathrm{~mL} \) of distilled water. 2. To tubes(A)andB)add a small amount (about the size of a few grains of rice) of \( \underline{b} \) blid iron (III) sulfate \( \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3} \), and to(ClancD)add a small amount of Salid) iron (II) sulfate \( \mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O} \). 3. To A add about \( 1 \mathrm{~mL} \) of \( 0.1 \mathrm{M} \) sodium bromide ( \( \mathrm{NaBr}) \) solution, and to Badd about \( 1 \mathrm{~mL} \) of \( 0.1 \mathrm{M} \) potassium iodide \( (\mathrm{KI}) \) solution. 4. CAUTION: CARRY OUT THIS STEP IN THE FUMEHOOD. To(C)add about \( 1 \mathrm{~mL} \) of bromine water ((Rr solution) and (CARE: TOXIC SUBSTANCES.) 5. To allfour test tube add about \( 1 \mathrm{~mL} \) fof dichloromethane and shake the mixttre gently. Leave the mixture for a few minutes (this allow time for the two layers to form). Record the colour of thelowedichloromethane layer in each tube. PLACE ALL WASTES IN THE HALOGEN WASTE BOTTLES IN THE FUMEHOODS. TABLE III: Reactions of \( \mathrm{Fe}^{3+} \) and \( \mathrm{Fe}^{2+} \) with halogens and halides \begin{tabular}{|c|c|c|c|c|} \hline Test Tube & Reaction Mixture & Colour of \( \mathrm{CH}_{2} \mathrm{Cl}_{2} \) layer & Identify halogen, if present, in each \( \mathrm{CH}_{2} \mathrm{Cl}_{2} \) layer & Did a chemical reaction occur (yes or no)? \\ \hline \( \mathrm{A} \) & \( \mathrm{Fe}^{3+}+\mathrm{Br}^{-} \) & & & \\ \hline \( \mathrm{B} \) & \( \mathrm{Fe}^{3+}+\mathrm{I}^{-} \) & & & \\ \hline \( \mathrm{C} \) & \( \mathrm{Fe}^{2+}+\mathrm{Br}_{2} \) & & & \\ \hline \( \mathrm{D} \) & \( \mathrm{Fe}^{2+}+\mathrm{I}_{2} \) & & & \\ \hline \end{tabular}