A complex PtCl ₄ .5 NH ₃ shows a molar conductance of 402 ohm ⁻¹ ~cm ^2 ~mol ⁻¹ in water and precipitates three moles of AgCl with AgNO ₃ solution. The formula of the complex is

Step-by-step solution

The complex PtCl ₄ .5 NH ₃ is designated as [ Pt ( NH ₃ )₅ Cl ] Cl ₃ which ionizes to [ Pt ( NH ₃ )₅ Cl ]³⁺+3 Cl ⁻ ions. Thus total ions produced are four but three moles of AgCl are produced from 3 Cl ⁻ ions with AgNO ₃ .