Calculate the weight of non`-` volatile solute having molecular weight 40, which should be dissolvd in `57 gm` octane to reduce its vapour pressure to `80% :`
A
47.2 g
B
5 g
C
106.2 g
D
None of these
Text Solution
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The correct Answer is:
b
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DILUTE SOLUTION
NARENDRA AWASTHI|Exercise Level 1 (Q.62 To Q.91)|1 Videos
Calculate the mass of a non-volatile solute ( molar mass 40g mol^-1 ) which should be dissolved in 114g octane to reduce its vapour pressure to 80%.
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1.0 gram of a non-volatile solute was dissolved in 100 gram of acetone (molecular mass = 58) at 298 K. The vapour pressure of solution was found to be 192.5 mm of Hg. Calculate the molecular mass of solute. The vapour pressure of pure acetone at 298 K is 195 mm of Hg.
The vapour pressure of a 5% aqueous solution of a non-volatile organic substances at 373K is 745 mm. calculate the molar mass of the solute. (Vapour pressure of water at 373K=760mm Hg).
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NARENDRA AWASTHI-DILUTE SOLUTION-Level 3 - Match The Column
