At what approximate temperature will a 40% ethanol solution freeze?
| March 16, 2021 | education
In order to solve the problem, we first need to create a condition for the problem.
Given:
ω% (C2H5OH) = 40%
delta t =?
Decision:
Cm = m (alcohol) * m (water) * mol.
Cm = m (C2H5OH) / (M (C2H5OH) * m (H2O) = 400 grams / 46 grams / mol * 0.6 kg = 8.69 mol / kg.
delta t = 1.86 * 8.69 = 26.93.
Answer: the solution will freeze at a temperature of – 26.93 0С.
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