Tamil Nadu Board of Secondary EducationHSC Science Class 12th

# A conductivity cell has been calibrated with a 0.01 M, 1 : 1 electrolytic solution (specific conductance (κ = 1.25 × 10−3 S cm−1) in the cell and the measured resistance was 800 Ω at 25°C. - Chemistry

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A conductivity cell has been calibrated with a 0.01 M, 1 : 1 electrolytic solution (specific conductance (κ = 1.25 × 10−3 S cm−1) in the cell and the measured resistance was 800 Ω at 25°C. The cell constant is, ____________.

• 10−1 cm−1

• 101 cm−1

• 1 cm−1

• 5.7 × 10−12

#### Solution

A conductivity cell has been calibrated with a 0.01 M, 1 : 1 electrolytic solution (specific conductance (κ = 1.25 × 10−3 S cm−1) in the cell and the measured resistance was 800 Ω at 25°C. The cell constant is, 1 cm−1.

Explanation:

R = ρ. "l"/"A"

cell constant = "R"/ρ

= κ."R" (1/ρ = κ)

= 1.25 × 10−3 Ω−1 cm−1 × 800 Ω

= 1 cm−1

Concept: Conductivity of Electrolytic Solution
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#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 12th Chemistry Volume 1 and 2 Answers Guide
Chapter 9 Electro Chemistry
Evaluation | Q 18. | Page 64
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