Question

the molality of a mgcl₂ solution is 1.44 m.
how many total ions does mgcl₂ break into when dissolved?
what is the total molality of the solution? m
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question 30 0/4 pts 5 19 details
the molality of a sugar solution (c₆h₁₂o₆) is 4.52 m.
how many total ions does c₆h₁₂o₆ break into when dissolved?
what is the total molality of the solution? m
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question 31 0/1 pt 5 19 details
will the boiling point of a solution be higher or lower compared to the boiling point of the pure solvent?

Explanation:

For MgCl₂ solution:

Step1: Determine ions from MgCl₂

MgCl₂ dissociates as \( \text{MgCl}_2
ightarrow \text{Mg}^{2+} + 2\text{Cl}^- \). So total ions per formula unit: \( 1 + 2 = 3 \).

Step2: Calculate total molality

Molality of MgCl₂ is \( 1.44 \, m \). Total molality = molality × ions per formula unit = \( 1.44 \times 3 = 4.32 \, m \).

Step1: Determine ions from C₆H₁₂O₆

Sugar (C₆H₁₂O₆) is a non - electrolyte, so it does not dissociate into ions. Total ions per molecule: 1 (the molecule itself, no dissociation into ions).

Step2: Calculate total molality

Molality of sugar is \( 4.52 \, m \). Since it does not dissociate, total molality = \( 4.52\times1 = 4.52 \, m \).

When a solute is added to a solvent to form a solution, the boiling point of the solution is higher than that of the pure solvent. This is due to the boiling point elevation colligative property. The solute particles (ions or molecules) interfere with the solvent's vaporization process, requiring a higher temperature to reach the vapor pressure equal to the external pressure.

Answer:

Total ions: 3; Total molality: 4.32 m

For sugar (C₆H₁₂O₆) solution: