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Transition metals (A-level only)

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Question 7

Which statement is correct about this reaction?

[Ni(H2O)6]2++3H2NCH2CH2NH2→[Ni(H2NCH2CH2NH2)3]2++6H2O \text{[Ni(H}_2\text{O)}_6]^{2+} + 3\text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2 \rightarrow \text{[Ni(H}_2\text{NCH}_2\text{CH}_2\text{NH}_2)_3]^{2+} + 6\text{H}_2\text{O} [Ni(H2​O)6​]2++3H2​NCH2​CH2​NH2​→[Ni(H2​NCH2​CH2​NH2​)3​]2++6H2​O

The coordination number of nickel decreases.

The enthalpy change of the reaction is large and positive.

The entropy change of the reaction is large and positive.

The shape of the complex changes from octahedral.

Transition metals (A-level only) Questions

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