11. Which of the following ions will exhibit colour in aqueous solution 1.Sc+3 2.La+3 3.Ti+3 4.Lu+3

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Predict which of the following will be coloured in aqueous solution? Ti³⁺, V³⁺,

Cu⁺, Sc³⁺, Mn²⁺, Fe³⁺ and Co²⁺. Give reasons for each.

3 d

+ 1

S c^{3 +}, V^{3 +}, T i^{4 +}, M n^{2 +}

S c = 21, V = 23, T i = 22, M n = 25

T i^{3 +}, V^{3 +}

C u^{+}, S c^{3 +}

F e^{2 +}, F e^{3 +}

C o^{2} +, N i^{2 +}

Z n^{2 +}, A g^{+}

S c^{3 +}

T i^{3 +}

T i^{3 +}, V^{3 +} (i i) C u^{+}, S c^{3 +} (i i i) F e^{2 +}, F e^{3 +} (i v) C o^{2 +}, N i^{2 +} (v) Z n^{2 +}, A g^{+}

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