Chemistry · Electrolytic and metallic conduction, conductance in electrolytic solutions, molar conductivities and their variation with concentration, Kohlrausch's law and its applications
The equivalent conductance of and are respectively 127 and 76 at infinite diluti
The equivalent conductance of \( B a^{2+} \) and \( C l^{-} \) are respectively 127 and 76 \( \operatorname{oh} m^{-1} c m^{2} e q^{-1} \) at infinite dilution. What will be the equivalent conductance of \( B a C l_{2} \) at infinite dilution?
- A. 139.5 ohm \( ^{-1} \mathrm{cm}^{2} \) eq \( ^{-1} \)
- B. 203 ohm \( ^{-1} \mathrm{cm}^{2} \) eq\( ^{-1} \)
- C. 279 ohm \( ^{-1} \mathrm{cm}^{2} \) eq \( ^{-1} \)
- D. 101.5 ohm \( ^{-1} \mathrm{cm}^{2} \) eq \( ^{-1} \)
Step-by-step solution
The equivalent conductance of BaCl2 at infinite dilution is given by the sum of the equivalent conductances of its ions: λ_eq(Ba2+) + λ_eq(Cl-) = 127 + 76 = 203 ohm^{-1} cm^2 eq^{-1}. This is because one equivalent of BaCl2 contains one equivalent of Ba2+ and one equivalent of Cl-.
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