1956
Question
At certain temperature (T) if the conductivity of pure water is 5.5×10−7Scm−1, then calculate pH of water at given temperature.
Given : λ∞H+=350Scm2sq−1;λ∞OH−∞200Scm2eq−1;λ∞OH−=200Scm2sq−1
At certain temperature (T) if the conductivity of pure water is 5.5×10−7Scm−1, then calculate pH of water at given temperature.
Given : λ∞H+=350Scm2sq−1;λ∞OH−∞200Scm2eq−1;λ∞OH−=200Scm2sq−1
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Solution
The correct option is D 5
Conductivity of pure water = 5.5×10−7Scm−1λ∞H+=350Scm2sq−1 λ∞OH−=200Scm2sq−1At infinity λ=550Scm2sq−1αOH−=λλ∘=5.5×10−7550=10−9pOH=−log(10−9)=9pH=14−9=5
Conductivity of pure water = 5.5×10−7Scm−1
λ∞H+=350Scm2sq−1 λ∞OH−=200Scm2sq−1
At infinity λ=550Scm2sq−1
αOH−=λλ∘=5.5×10−7550=10−9
pOH=−log(10−9)=9
pH=14−9=5
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