Question

The molality of c2h5oh in water solution wch will freeze at -10 c

Answer 1

Depression in freezing point=K*molality
We know that molality depression constant of water is 1.86
Depression of freezing point here is 10°C
Now apply formula
10=1.86*molality
molality=10/1.86
=5.37
Hope it helps

Answer 2

Answer:

The molality of c2h5oh in water solution why will freeze at -10 c=5.37

Explanation:

Step 1:

5.12 K kgmol-1 is the freezing point depression constant (Kf) of benzene. For the solution with molality 0.078 m containing a non-electrolyte solute in benzene, the depression of freezing point is (rounded off to two decimal places): Q. Ethanol has a freezing point depression constant (Kf) of 1.99 K kg mol-1.

Step 2:

Depression in freezing point=K*molality

We know that molality depression constant of water is 1.86

Depression of freezing point here is 10°C

Now apply formula

10=1.86*molality

molality=10/1.86

=5.37

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