Redox and Qualitative Analysis (OCR A-Level Chemistry A): Flashcards

+2 ($\text{Fe}^{2+}$) and +3 ($\text{Fe}^{3+}$)

Purple to colourless

Reduced (gain electrons)

Orange to green

Same element simultaneously oxidized and reduced

Brown Cu metal and blue $\text{CuSO}_4$ solution

$\text{NH}_3$ gas turns red litmus blue

Effervescence (fizzing) as $\text{CO}_2$ released

White precipitate of $\text{BaSO}_4$

White, cream, yellow