Manipal MET2010ChemistryElectrochemistry
Both Co ³⁺ and Pt ⁴⁺ have a coordination number of six. Which of the following pairs of complexes will show approximately the sáme 'electrical conductance for their - 0.001 M aqueous solutions?
Options
- ACoCl ₃ 4 NH ₃ and PtCl ₄ 4 NH ₃
- BCoCl ₃ 3 NH ₃ and PtCl ₄ 5 NH ₃
- CCoCl ₃ 6 NH ₃ and PtCl ₄ 5 NH ₃
- DCoCl ₃ 6 NH ₃ and PtCl ₄ 3 NH ₃
Correct answer
C. CoCl ₃ 6 NH ₃ and PtCl ₄ 5 NH ₃
Step-by-step solution
Co ³⁺ and Pt ⁴⁺ have 6 coordination number. CoCl ₃ 6 NH ₃ and PtCl ₄ 5 NH ₃ [ Co ( NH ₃ )₆ ] Cl ₃ In solution [ Co ( NH ₃ )₆ ]³⁺+3 Cl ⁻ [ PtCl ( NH ₃ )₅ ] Cl ₃ In solution [ PtCl ( NH ₃ )₅ ]³⁺+3 Cl ⁻ Number of ionic species are same in the solution of both complexes, therefore their equimolar solutions will show same conductance.