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Which of the following solutions has the highest boiling point elevation? (2020)

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Question: Which of the following solutions has the highest boiling point elevation? (2020)

Options:

  1. 0.1 M NaCl
  2. 0.1 M KCl
  3. 0.1 M CaCl2
  4. 0.1 M MgCl2

Correct Answer: 0.1 M CaCl2

Exam Year: 2020

Solution:

Boiling point elevation is proportional to the number of particles in solution. CaCl2 dissociates into 3 ions (1 Ca²⁺ and 2 Cl⁻), giving the highest elevation.

Which of the following solutions has the highest boiling point elevation? (2020)

Practice Questions

Q1
Which of the following solutions has the highest boiling point elevation? (2020)
  1. 0.1 M NaCl
  2. 0.1 M KCl
  3. 0.1 M CaCl2
  4. 0.1 M MgCl2

Questions & Step-by-Step Solutions

Which of the following solutions has the highest boiling point elevation? (2020)
  • Step 1: Understand that boiling point elevation happens when a solute is added to a solvent, making the boiling point higher.
  • Step 2: Know that the more particles a solute breaks into when it dissolves, the greater the boiling point elevation.
  • Step 3: Look at the solute options given in the question. Identify how many particles each solute produces when it dissolves.
  • Step 4: For example, if you have CaCl2, it breaks into 3 particles: 1 calcium ion (Ca²⁺) and 2 chloride ions (Cl⁻).
  • Step 5: Compare this with other solutes. If another solute only breaks into 2 particles, it will cause less boiling point elevation than CaCl2.
  • Step 6: Conclude that the solution with CaCl2 has the highest boiling point elevation because it produces the most particles.
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