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The molar conductivities of KCl, NaCl an...

The molar conductivities of KCl, NaCl and `KNO_(3)` are 152,128 and 111 S `cm^(2) "mol"^(-1)`, respectively. What is the molar conductivity of `NaNO_(3)` ?

A

101 S `cm^(2) "mol"^(-1)`

B

87 S `cm^(2) "mol"^(-1)`

C

`-101 S cm^(2) "mol"^(-1)`

D

`- 391 S cm^(2) "mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
b
`NaCl + KNO_(3) rarr NaNO_(3) + KCl`
Molar conductivity of KCl = 152 S `cm^(2) "mol"^(-1)`
Molar conductivity of NaCl = 128 `cm^(2) "mol"^(-1)`
Difference = 24 S `cm^(2) "mol"^(-1)`
Molar conductivities of `NaNO_(3)`
`= 111 - 24 = 87 S cm^(2) "mol"^(-1)`
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