Description of experiment
Below follows a plain text transcript of the selected experiment.
Needed compounds:
-----------------
sulphuric acid : H2SO4
potassium tetrachloro iodate (III) : KICl4
Class:
------
redox
elem=I,Cl
Summary:
--------
Potassium tetrachloroiodide decomposes on heating. The residue, which
remains behind is potassium chloride.
Description:
------------
Put a small amount of solid KICl4 in a test tube and heat this: A brown gas
is evolved from the solid and the solid itself turns white. The brown gas
probably is a mix of ICl and Cl2. It has a choking odour, similar to chlorine,
but somewhat different.
Blow away the brown gas and add some concentrated H2SO4 to the white solid
which remains: The solid starts bubbling and a colorless gas is evolved. On
heating the gas is evolved a little bit faster. Thick fumes are produced,
when the gas comes in contact with humid air. The gas is HCl.