Which of the following variables are sufficient to calculate molality-Mass of solute-Moles of solute-Moles of solvent-Mass of solvent-

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Standard IX

Chemistry

Molality

Which of the ...

Question

Which of the following variables are sufficient to calculate molality?

Mass of solute

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Moles of solute

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Moles of solvent

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Mass of solvent

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Solution

The correct options are
B
Moles of solute

D
Mass of solvent

Mass of the given solute alone might not be sufficient unless we know the actual structural formula to calculate the number of moles of the solute.

Similarly, knowing just the number of moles of solvent might not be sufficient when the actual structural formula is not known.

For example, molality of a hypothetical solution B and solute A could be calculated if the mass of B and moles of A were known.

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Similar questions

Which among the following formulae can be used for calculating the concentration?

(i) $\frac{mass of solute}{mass of solution} \times 100$

(ii) $\frac{mass of solute}{mass of solute + solvent} \times 100$

(iii) $\frac{mass of solvent}{mass of solution} \times 100$

(iv) $\frac{mass of solvent}{mass of solute + solvent} \times 100$

(v) $\frac{mass of solute}{volume of solution} \times 100$

(vi) $\frac{mass of solvent}{volume of solution} \times 100$

Which among the following formulae can be used for calculating the concentration?

(i) $\frac{mass of solute}{mass of solution} \times 100$

(ii) $\frac{mass of solute}{mass of solute + solvent} \times 100$

(iii) $\frac{mass of solvent}{mass of solution} \times 100$

(iv) $\frac{mass of solvent}{mass of solute + solvent} \times 100$

(v) $\frac{mass of solute}{volume of solution} \times 100$

(vi) $\frac{mass of solvent}{volume of solution} \times 100$

Calculate molar mass of solvent if 5.25% solution of an unknown substance is isotonic with 1.5% solution urea in same solvent kept at same temperature.

Which of the following formula can be used for calculating concentration?

(i) $\frac{mass of solute}{mass of solution} \times 100$

(ii) $\frac{mass of solute}{mass of solute + solvent} \times 100$

(iii) $\frac{mass of solvent}{mass of solution} \times 100$

(iv) $\frac{mass of solvent}{mass of solute + solvent} \times 100$

(v) $\frac{mass of solute}{volume of solution} \times 100$

(vi) $\frac{mass of solvent}{volume of solution} \times 100$

Q. Consider a binary mixture of volatile liquids.
For which of the following graph , solvent-solute interaction equal to that of solvent-solvent and the solute-solute interactions?

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