Sagedamini esinevad korrosioonid
Aim
To familiarize oneself with some more common instances of corrosion.
Reagents
Hydrochloric acid 0.1 M; sulphuric acid 0.1 M; zinc and aluminium granules; copper wire;
solution of copper(II) sulphate; solution of copper(II) chloride; solution of iron(II) sulphate;
solution of potassium hexacyanoferrate(III); zinc-plated iron sheet; tin-plated iron sheet; iron
paper clips; solid NaCl; urotropin.
Equipment
Test tubes, small beaker (50 cm3), centrifuge tube.
Experiments
1. Making of a galvanic pair
1.1. Place a zinc granule on the bottom of the centrifuge tube and pour solution of
hydrochloric acid on top. Write down the equation of reaction which occurs. Which
compound is the oxidant, which is the reductant?
Zn+2 HCl ZnCl 2 + H 2
-¿ H 2
annaabi.ee 
