Chapter 16.4, Problem 42LC

Interpretation Introduction

Interpretation: The two ways of expressing the ratio of solute particles to solvent particles are to be calculated.

Concept introduction: Molality is defined as the measurement of the Number of moles of solute present in 1kg of solvent.

Mole fraction is defined as the number of moles of the specific component in solution over the total number of moles in a given solution.

Answer to Problem 42LC

The two ways of expressing the ratio of solute particles to solvent particles are Molality and Mole fraction.

Explanation of Solution

The two ways of expressing the ratio of solute particles to solvent particles are Molality and Mole fraction.

Molality is defined as the measurement of the Number of moles of solute present in 1kg of solvent.

  $m=\frac{n(\text{moles})}{M(\text{Kg})}$

Where,

• $n$ represents the moles of solvent.
• $M\left(\text{kg}\right)$ represents the mass of the solution.

Mole fraction is defined as the number of moles of the specific component in solution over the total number of moles given in the solution.

  $X_A=\frac{molA}{molA+molB}$ ;

  $X_B=\frac{molB}{molA+molB}$ ;

Where,

• $X_A$ is the mole fraction of solute A.
• $X_B$ is the mole fraction of solute B.
• $molA$ are the moles of solute A.
• $molB$ are the moles of solute B.
• $molA+molB$ is the total number of moles of all the solvents.

Conclusion

The two ways of expressing the ratio of solute particles to solvent particles are Molality and Mole fraction.