Resistance of a conductivity cell (cell constant ) filled with 74.5 ppm KCl is (solution 1). Same cell with 149 ppm KCl has resistance (solution 2). The ratio . The value of x is . (Molar mass of KC

Question

Resistance of a conductivity cell (cell constant ) filled with 74.5 ppm KCl is  (solution 1). Same cell with 149 ppm KCl has resistance  (solution 2). The ratio . The value of x is . (Molar mass of KCl = )

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Strategy:
 Calculate specific conductance () for both solutions using . Convert ppm (parts per million) to molar concentration, then find molar conductivity ().

Step 1: Conductivities
.
- Solution 1: 
- Solution 2:

Step 2: Concentrations
 molar mass .
- 
-

Step 3: Molar Conductivities

Ratio .

Expected value in specific context: .

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