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Ready

Illustrated sequence · not the actual reaction rate

Metal to immerseSalt solution

Changing either substance supplies a clean sample. Immerse it and observe the surface and solution colour.

Clean surfaces, excess metal; 100 mL of 0.10 mol/L solution. Room temperature.

Model notes

Only Mg, Zn, Fe and Cu with their four sulfate solutions are included, with clean surfaces and excess metal. FeSO₄ contains Fe(II), not Fe(III).
Do not extrapolate to K, Na or Ca, which react with water; Al requires consideration of its protective oxide film. Mg is not completely inert to water either.
Side reactions with water/acids, H₂ gas, hydroxide precipitation, oxide films and oxidation by air are not modelled. Bubbles alone do not demonstrate metal displacement.
Colour, deposits and timing are illustrative, not predictions of actual rate, morphology or yield. In a real experiment, a lack of visible change also depends on surface conditions and observation time.
Only completed positive displacement results generate ordering relationships. No displacement is a result within this model, not an absolute conclusion for all conditions.

Ready

Immerse the metal, then observe the deposit and solution colour.