Which of the following will exhibit the greatest vapor pressure lowering?

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Question: Which of the following will exhibit the greatest vapor pressure lowering?

Options:

Correct Answer: 0.1 M CaCl2

Solution:

CaCl2 dissociates into three ions (Ca2+ and 2 Cl-), leading to the greatest vapor pressure lowering among the options.

Which of the following will exhibit the greatest vapor pressure lowering?

Which of the following will exhibit the greatest vapor pressure lowering?

Step 1: Understand what vapor pressure lowering means. It occurs when a solute is added to a solvent, reducing the solvent's vapor pressure.
Step 2: Know that ionic compounds dissociate into ions when dissolved in water. The more ions produced, the greater the effect on vapor pressure.
Step 3: Look at the options given. Identify which compounds are ionic and how many ions they produce when dissolved.
Step 4: For CaCl2, it dissociates into 3 ions: 1 Ca2+ ion and 2 Cl- ions.
Step 5: Compare the number of ions produced by other options. The one with the most ions will have the greatest vapor pressure lowering.
Step 6: Conclude that since CaCl2 produces the most ions, it will exhibit the greatest vapor pressure lowering.

No concepts available.