COMEDK · Chemistry · 17. Solutions
What is the amount of ice that separates out on cooling a solution containing \(60 \mathrm{~g}\) of Ethylene glycol in \(250 \mathrm{~g}\) of water to \(-9.3^{\circ} \mathrm{C}\) ? \(\mathrm{K}_{\mathrm{f}}\) of \(\mathrm{H}_2 \mathrm{O}=1.86 \mathrm{~K} / \mathrm{m} ;\) MM of ethylene glycol= \(62 \mathrm{~amu}\)
- A 195 g
- B 56.46 g
- C 193.55 g
- D 90.2 g
Answer & Solution
Correct Answer
(B) 56.46 g
Step-by-step Solution
Detailed explanation
The molar mass of ethylene glycol is \(62 \text{ g/mol}\). The number of moles of ethylene glycol is \(n = \dfrac{60}{62} \approx 0.9677 \text{ mol}\). The freezing point depression formula is \(\Delta T_f = K_f \times m\), where \(m\) is the molality of the solution. Given…
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