Which of the following has the highest freezing point depression?
Practice Questions
Q1
Which of the following has the highest freezing point depression?
0.1 molal NaCl
0.1 molal KBr
0.1 molal CaCl2
0.1 molal glucose
Questions & Step-by-Step Solutions
Which of the following has the highest freezing point depression?
Step 1: Understand what freezing point depression means. It is the lowering of the freezing point of a solvent when a solute is added.
Step 2: Know that the freezing point depression depends on the number of particles (ions or molecules) the solute breaks into when dissolved in the solvent.
Step 3: Identify the solute in the question. In this case, we are looking at CaCl2.
Step 4: Determine how many ions CaCl2 dissociates into when it dissolves in water. CaCl2 breaks into 1 calcium ion (Ca2+) and 2 chloride ions (Cl-).
Step 5: Count the total number of ions produced by CaCl2. It produces 3 ions in total (1 Ca2+ and 2 Cl-).
Step 6: Compare this with other solutes (if provided) to see which one produces more ions. The more ions produced, the higher the freezing point depression.
Step 7: Conclude that since CaCl2 produces the most ions, it has the highest freezing point depression.
