Question

The correct order of the stoichiometries of AgCl formed when
AgNO₃ in excess is treated with the complexes : CoCl₃.6NH₃,
CoCl₃.5NH₃, CoCl₃.4NH₃ respectively is :- [2017]
(a) 3 AgCl, 1 AgCl, 2 AgCl
(b) 3 AgCl, 2 AgCl, 1 AgCl
(c) 2 AgCl, 3 AgCl, 1 AgCl
(d) 1 AgCl, 3 AgCl, 2 AgCl

Answer 1

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes : CoCl₃.6NH₃, CoCl₃.5NH₃, CoCl₃.4NH₃ respectively is:

(b) 3 AgCl, 2 AgCl, 1 AgCl

Stoichiometry refers to the quantitative relationship between reactants and products present in a chemical equation.

Here, the equations involved are:

• CoCl₃.6NH₃=[Co(NH₃​)₆​]Cl₃

• [Co(NH₃​)₆​]Cl₃​+3AgNO₃→[Co(NH₃​)₆​](NO₃​)₃​+3AgCl↓.

Here, 3 moles of AgCl are formed.

• CoCl₃​.5NH₃​=[Co(NH₃​)5​Cl]Cl₂

• [Co(NH₃​)5​Cl]Cl₂​+2AgNO₃​→[Co(NH₃​)5​Cl](NO₃​)₂​+2AgCl↓.

Here, 2 moles of AgCl are formed.

• CoCl₃.4NH₃​=[Co(NH₃)4​Cl₂​]Cl

• [Co(NH₃)4​Cl₂​]Cl+AgNO₃→[Co(NH₃​)4​Cl₂]NO₃​+AgCl↓.

Here, 1 mole of AgCl is formed.

Answer 2

3 AgCl, 2 AgCl, 1 AgCl are formed respectively.

Explanation:

• Stoichiometry is defined as the ratio of the reactant and products formed in a reaction.

• Here the complex ions of Cobalt chloride amines are given.

• These complexes obey the Warners valency theory.

• This theory states that each complex ion metals have 2 valencies - primary valency and secondary valency.

• The primary valency should be completed by the negative ions.

• The secondary valencies can be completed by either negative, positive or even neutral species.

• Cobalt is a large atom, so forms sp3d2 hybridization and octahedral geometry.

• So it will have 6 chelates.

• Thus, in 1st case,

• CoCl₃.6NH₃ is actually present as [Co(NH₃​)₆​]Cl₃ where there are 3 ionisable chloride ions.

• So the reaction will be

• [Co(NH₃​)₆​]Cl₃​+3AgNO₃→[Co(NH₃​)₆​](NO₃​)₃​+3AgCl↓.

• So, we get 3 moles of AgCl in this case.

• In case of  CoCl₃​.5NH₃​ it is present as [Co(NH₃​)5​Cl]Cl₂.

• So it has 2 ionisable chloride ions.

• So the reaction goes as,

• [Co(NH₃​)5​Cl]Cl₂​+2AgNO₃​→[Co(NH₃​)5​Cl](NO₃​)₂​+2AgCl↓.

• So here we get 2 moles of AgCl.

• In the last case,  CoCl₃.4NH₃​ is present as [Co(NH₃)4​Cl₂​]Cl.

• So here is only 1 ionisable chloride ions.

• So the reaction will be.

• [Co(NH₃)4​Cl₂​]Cl+AgNO₃→[Co(NH₃​)4​Cl₂]NO₃​+AgCl↓.

• Here we get 1 mole of AgCl.

• So the Stoichiometric ratio becomes 3:2:1.

For more information about Warners theory,

https://brainly.in/question/8550817

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https://brainly.in/question/13142201

Define warner's theory ?​ - Brainly.in