Chemistry - Liquid Solution Question with Solution | TestHub

ChemistryLiquid SolutionColligative PropertiesMedium2 minQB

ChemistryMediumsingle choice

A student dissolves 0.029 g of an unknown acid is 10 ml of water \& obtains the cooling curve shown below. On titration of this solution, molar mass of acid is determined to be $120 g mol^{- 1}$ . The freezing point of solution is approximately $- 0.02 6^{\circ} C$ , then which of the following statements is incorrect?

( $K_{f}$ of H₂O $= 1.86 K k g / m o l$ )

Options:

Answer:

Solution:

$Δ T_{f} = i \times m \times K_{f}$

$0.026 = i \times \frac{0.029}{120} \times \frac{1000}{10} \times 1.86$

$i = 0.578$

So, $M_{obs} = \frac{120}{0.579} ≃ 207$

Stream:JEESubject:ChemistryTopic:Liquid SolutionSubtopic:Colligative Properties

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...