#ion dissociation

CHEMISTRY

How many ions are produced when [Co(NH₃)6]Cl₃ dissolves in water?

[Co(NH₃)6]Cl₃ dissociates into [Co(NH₃)6]^{3+ and 3 Cl^- ions, producing a total of 4 ions in solution. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.

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Nomenclature of Coordination Compounds

Which complex produces 3 ions in aqueous solution, including the coordination sphere?

[Ni(NH₃)4]Cl₂ dissociates into [Ni(NH₃)4]2+ and 2 Cl−, totaling 3 ions.

Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds

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Colour and Magnetic Properties and Stability and Importance

Which complex has a coordination sphere that does not dissociate into ions in solution?

[Ni(NH₃)2Cl₂] is neutral, with no counter ions, so its coordination sphere remains intact in solution.

Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance

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Abnormal Molar Masses and van't Hoff Factor

A solute dissociates into 3 ions with a van’t Hoff factor of 2.2. What is the degree of dissociation?

i = 1 + α (n - 1) , where n = 3 . 2.2 = 1 + α (3 - 1) . 2.2 = 1 + 2α , α = (1.2/2) = 0.6 .

Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Abnormal Molar Masses and van't Hoff Factor

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Abnormal Molar Masses and van't Hoff Factor

A solute dissociates into 3 ions with a van’t Hoff factor of 1.8. What is the degree of dissociation?

i = 1 + α (n - 1) , where n = 3 . 1.8 = 1 + α (3 - 1) . 1.8 = 1 + 2α , α = (0.8/2) = 0.4 .

Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Abnormal Molar Masses and van't Hoff Factor

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Abnormal Molar Masses and van't Hoff Factor

A solute dissociates into 2 ions with a van’t Hoff factor of 1.6. What is the degree of dissociation?

i = 1 + α (n - 1) , where n = 2 . 1.6 = 1 + α . α = 1.6 - 1 = 0.6 .

Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Abnormal Molar Masses and van't Hoff Factor

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