Question

Equal weights of NaCl and KCl are dissolved separately in equal volumes of solutions. Molarity of the two solutions will be:

• A. Equal
• B. That of NaCl will be less than that of KCl
• C. That of NaCl will be more than that of KCl
• D. That of NaCl will be about half of that of KCl

Hint:

Molarity is inversely related to the molar mass of the solute. The lower the molar mass, the higher the molarity for a given mass.

Answer 1

The Correct Option is C

Step 1: Understand the concept of molarity.
Molarity is given by \( M = \frac{\text{moles}}{\text{volume in liters}} \). If equal weights of NaCl and KCl are dissolved in the same volume, the molarity will be higher for NaCl due to its lower molar mass.
Step 2: Conclusion.
The molarity of NaCl will be more than that of KCl. Final Answer: \[ \boxed{\text{That of NaCl will be more than that of KCl}} \]