A solution of 5.0 g of benzoic acid (C₆H₅COOH) in 100.0 g of carbon tetrachloride has a boiling point of 77.5°C.
(a) Calculate the molar mass of benzoic acid in the solution.

Respuesta :

Based on the rise of the boiling point, the molar mass of benzoic acid in the solution is 251.3 g/mol.

What is Elevation in boiling point?

When a chemical is added, the boiling point of a liquid (a solvent) will rise, which means that a solution has a higher boiling point than a pure solvent. This phenomenon is known as boiling-point elevation.

The relationship between the solution's solute content and its rising boiling point is straightforward (Tb).

Given:

Mass of benzoic acid= 5.0g

to find molar mass:

Therefore after calculation , benzoic acid has a molar mass of 251.3 g/mol.

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