Freezing Point
Isnt Water always suppose to be Solvent? in this Question if we take water as solvent we will get wrong answer
Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to-day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator automobiles.
A solution M
is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixtrue is 0.9
Given Freezing point depression constant of water (kwater )=1.86 K kg mol−1
Freezing point depression constant of ethanol (kethanol f)=2.0Kkgmol−1
Boiling point elevation constant of water (kwater b)=0.52Kkgmol−1
Boiling point elevation constant of ethanol (kethanol b)=1.2Kkgmol−1
Standard freezing point of water =273 K
Standard freezing point of ethanol =155.7 K
Standard boiling point of water =373 K
Standard boiling point of ethanol =351.5 K
Vapour pressure of pure water =328 mm
of Hg
Vapour pressure of pure ethanol =40 mm
of Hg
Molecular weight of water =18 g mol−1
Molecular weight of ethanol =46 g mol−1
In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative.Question:
The freezing point of the solution M
is
9 Replies
@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.will we get wrong ans if we use depression of freezing point formula with water as solvent?
iteachchem
Transcription requested by TempestUknow
0.9 and that and that will completely allowed to the answer. It does not make sense.
iteachchem
Transcription requested by TempestUknow
साल्वेंट वही होगा जिसकी क्वांटिटी जादा होगी और भी यह करना है कि सल्वेंट और सुलूट आरहा थे ज़ेनिए आपको कुछ कहानी बताते हैं कि सुलूट आरहा थे यह उसका नहीं लगता है कि इस दर्ड हुई या सुलूट आरहा है
+solved @iTeachChem
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