Chemsheets usually focuses on:
The Task: Converting the halogenoalkane into an alcohol. Reagent: NaOH (aq) Condition: Heat under reflux
While not a “reaction to form a product” for its own sake, this is always on Chemsheets 1 as an application. reactions of halogenoalkanes 1 chemsheets answers exclusive
Method: Add ethanol (to dissolve the organic halide), then aqueous silver nitrate. Warm gently.
The Reaction: R-X + Ag⁺ (from AgNO₃) + H₂O → R-OH + AgX(s) + H⁺ Chemsheets usually focuses on: The Task: Converting the
Key Table for Your Worksheet Answers:
| Halogenoalkane | Precipitate Color | Rate of Precipitation | Bond Enthalpy (C-X) | |---|---|---|---| | Fluoroalkane | No precipitate (AgF soluble) | Very slow (usually not seen) | Very high (484 kJ/mol) | | Chloroalkane | White (AgCl) | Slow (minutes, needs warming) | 338 kJ/mol | | Bromoalkane | Cream (AgBr) | Faster (seconds to minutes) | 276 kJ/mol | | Iodoalkane | Yellow (AgI) | Instant (room temperature) | 238 kJ/mol | requiring backside attack before I⁻ leaves.”
Exclusive Reasoning:
Chemsheets Question Example: “Explain why 2-iodo-2-methylpropane gives a precipitate instantly with AgNO₃(aq), but 1-iodopropane takes several minutes.” Model Answer: “2-iodo-2-methylpropane is tertiary, so it undergoes SN1 reaction via a stable carbocation, leading to rapid release of I⁻ ions. 1-iodopropane is primary and must undergo slower SN2 reaction, requiring backside attack before I⁻ leaves.”