Which of the following 3d- metal ion will give the lowest enthalpy of hydration $(Δ_{h y d} H)$ when dissolved in water?

Option 1 - Cr2+

Option 2 - Mn2+

Option 3 - Fe2+

Option 4 - Co2+

3 Views|Posted 6 months ago

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Answered by

Payal Gupta | Contributor-Level 10

6 months ago

Correct Option - 2

Detailed Solution:

Following are the $Δ H °$ hydration of given ions

Cr²⁺ - 1926 KJ/mole

Mn²⁺ - 1860 KJ/mole

Fe²⁺ - 2000 KJ/mole

Co²⁺ - 2078 KJ/mole

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Which of the following 3d- metal ion will give the lowest enthalpy of hydration ( Δ h y d H ) when dissolved in water?

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