Variable Oxidation States (AQA A-Level Chemistry): Flashcards

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Variable Oxidation States
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Key property of transition elements' oxidation states

Can exist in multiple oxidation states

Number of primary oxidation states of vanadium

Four (V, IV, III, II)

Colour & formula of V(V)

Yellow, VO2+\text{VO}_2^+

Colour & formula of V(IV)

Blue, VO2+\text{VO}^{2+}

Colour & formula of V(III)

Green, V3+\text{V}^{3+}

Colour & formula of V(II)

Violet, V2+\text{V}^{2+}

Reducing agent used in vanadium reduction

Zinc (in acidic solution)

Colour change: V(V) to V(IV)

Yellow to blue

Colour change: V(IV) to V(III)

Blue to green

Colour change: V(III) to V(II)

Green to violet

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