Which of the following compounds will have the highest boiling point when dissolved in water?

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NaCl
KBr
MgCl2
LiI

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Q: Which of the following compounds will have the highest boiling point when dissolved in water?

Solution: MgCl2 dissociates into 3 ions (1 Mg²⁺ and 2 Cl⁻), leading to the highest boiling point elevation due to the greatest number of particles.

Steps: 6

Step 1: Understand that boiling point elevation occurs when a solute is added to a solvent, like water.
Step 2: Know that some compounds break apart into smaller particles when they dissolve in water. This is called dissociation.
Step 3: Identify the compounds in the question and determine how many ions each compound produces when dissolved in water.
Step 4: For example, MgCl2 dissociates into 3 ions: 1 magnesium ion (Mg²⁺) and 2 chloride ions (Cl⁻).
Step 5: Compare the number of ions produced by each compound. The more ions produced, the higher the boiling point elevation.
Step 6: Conclude that since MgCl2 produces the most ions, it will have the highest boiling point when dissolved in water.

Which of the following compounds will have the highest boiling point when dissolved in water?

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