Question

Which is a hard acid CO2+ or CO3+? Why?

Answer 1

Answer:

CO3+ has more tendency to form coordination complexes than Co2+. (c) The ions with d1 configuration can easily lose one more electron to acquire extra stability of d0 configuration.

Explanation:

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Answer 2

Hard acid is Lewis acids which is weakly polarizable.

Explanation:

• Hard acids is not easily polarizable
• Hard acid have faster reactivity with hard bases
• They form strong bonds with  hard bases
• They have high charge densities.

• They have high charge densities.

• they are cations of electropositive metals
• Hard acids prefer to form bonds with hard bases.

• CO₃²⁻ carbonate ion can accept protons and form bicarbonate ions.

• CO₃²⁻  is a hard acid.