Which of the following equations correctly represents the boiling‑point elevation (ΔT_b) of a dilute solution?
Answer
ΔT_b = i·K_b·m
The correct answer is ΔT_b = i·K_b·m — Compare each option with this expression and select the one that matches exactly.
Step-by-step solution
- Identify the variables: ΔT_b is the boiling‑point elevation, i is the van 't Hoff factor, K_b is the ebullioscopic constant, and m is the molality of the solution.
- Recall the formula for boiling‑point elevation for a dilute solution: ΔT_b = i·K_b·m.
- Compare each option with this expression and select the one that matches exactly.
Common mistake: Omitting the van 't Hoff factor i in the expression
Concept tested: Boiling‑point elevation formula
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