Experiments with tin, lead and their compounds

 

  element required compound link to experiment
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Pb

Pb(NO3)2

Electrolysis, formation of lead crystals. A solution of lead nitrate in a petri dish is electrolysed. Crystals of lead metal are formed at the cathode.

 

Pb

Pb(NO3)2

KI

Nice effects in petri dish with yellow precipitate. Lead nitrate and potassium iodide are put in a petri dish, filled with water. The dissolved salts diffuse towards each other, giving nice effects.

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Pb

PbI2

Lead iodide: color depending on temperature and decomposition. lead iodide is heated. If heating is not too strong, then it can change color reversibly from yellow to deep red.

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Pb

Pb(CH3COO)33H2O

KI

CH3COOH (dilute)

"Golden" crystals of lead iodide. A yellow precipitate of lead iodide is made and dissolved in boiling water. On cooling down, beautiful glittering yellow crystals are formed.

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Sn

SnCl22H2O

KI

HCl (dilute)

Tin chloride and iodide, formation of a remarkable orange complex/precipitate. Tin chloride and potassium iodide, when added to each other, result in formation of yellow precipitate. At high concentration and after some time, this precipitate turns orange.

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Sn

Sn (preferably powder)

I2

CH2Cl2 or CS2

Preparation of tin(IV) iodide, a volatile covalent compound. Tin and iodine are made to react in a suitable solvent for iodine. Under these conditions the interesting compound tin(IV) iodide is formed, which can easily be isolated. Some properties of this compound are shown.

 

 

   

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