Question

How does the graph of molar conductivity vs square root of concentration look like for NaCl?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

NaCl is a strong electrolyte.
For strong electrolytes, $\wedge m$ increases slowly with dilution and can be represented by the equation:
${\wedge }_m={\wedge }_m^{\circ }-k\sqrt{C}$ When it plotted on a graph with ${\wedge }_{m}and\sqrt{C}$ as axes, it is a straight line with negative slope.