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The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:
  • a)
    Mn2+ > Ca2+ > Zn2+
  • b)
    Zn2+ > Ca2+ > Mn2+
  • c)
    Mn2+ > Zn2+ > Ca2+
  • d)
    Zn2+ > Mn2+ > Ca2+
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2...
Enthalpy of Hydration
  • Enthalpy of hydration is the amount of energy released when one mole of an ion in the gaseous state dissolves in water to form an aqueous solution.
Order of Enthalpies of Hydration
  • The order of enthalpies of hydration of Ca2+, Mn2+, Zn2+ can be determined by considering the size and charge of the ions.
  • Ca2+ has a larger size than Mn2+ and Zn2+, so it has a weaker hydration energy than the other two.
  • Mn2+ has a smaller size than Zn2+, but it has a greater charge density due to its higher charge. This results in a stronger hydration energy for Mn2+ than Zn2+.
  • Zn2+ has the smallest size and charge, resulting in the strongest hydration energy.
  • Therefore, the order of the enthalpies of hydration is Zn2+ > Mn2+ > Ca2+.
The correct answer is option D, which lists the order of enthalpies of hydration as Zn2+, Mn2+, Ca2+.
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Most Upvoted Answer
The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2...
Enthalpy of Hydration
Enthalpy of hydration is the amount of energy released when one mole of an ion in the gaseous state dissolves in water to form an aqueous solution.

Order of Enthalpies of Hydration
The order of enthalpies of hydration of Ca2+, Mn2+, Zn2+ can be determined by considering the size and charge of the ions.

- Ca2+ has a larger size than Mn2+ and Zn2+, so it has a weaker hydration energy than the other two.
- Mn2+ has a smaller size than Zn2+, but it has a greater charge density due to its higher charge. This results in a stronger hydration energy for Mn2+ than Zn2+.
- Zn2+ has the smallest size and charge, resulting in the strongest hydration energy.

Therefore, the order of the enthalpies of hydration is Zn2+ > Mn2+ > Ca2+.

Answer
The correct answer is option D, which lists the order of enthalpies of hydration as Zn2+, Mn2+, Ca2+.
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Community Answer
The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2...
This is because :
"hydration energy is inversely proportional to size of an atom"
on moving down the group : the size of an increase,
so H.E. decreases.
on moving from left to right in a period: the size of an atom decreases,
so H.E. increases.
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The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2+ > Ca2+ > Zn2+b)Zn2+ > Ca2+ > Mn2+c)Mn2+ > Zn2+ > Ca2+d)Zn2+ > Mn2+ > Ca2+Correct answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2+ > Ca2+ > Zn2+b)Zn2+ > Ca2+ > Mn2+c)Mn2+ > Zn2+ > Ca2+d)Zn2+ > Mn2+ > Ca2+Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The enthalpies of hydration of Ca2+, Mn2+, Zn2+ follow the order:a)Mn2+ > Ca2+ > Zn2+b)Zn2+ > Ca2+ > Mn2+c)Mn2+ > Zn2+ > Ca2+d)Zn2+ > Mn2+ > Ca2+Correct answer is option 'D'. Can you explain this answer?.
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