You Wish to Deice Your Driveway,so You Consider Buying 10

question 21

Multiple Choice

You wish to deice your driveway,so you consider buying 10 lb of NaCl,10 lb of CaCl₂,or 10 lb of MgCl₂.Which of these would deice your driveway most effectively? Assume that ideal dissociation of the salts occurs and that colligative properties are the only consideration.

• A)10 lb NaCl will deice best.
• B)10 lb CaCl₂ will deice best.
• C)10 lb MgCl₂ will deice best.
• D)The three driveways will deice to the same extent.
• E)10 lb of CaCl₂ or 10 lb of MgCl₂ will deice equally well.

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