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Quicklime
and slaked lime are very corrosive: Goggles and gloves needed!
For roughcasting a newly
built room slaked lime, sand and water are mixed to make a lime mortar.
While this pulp hardens
on the wall a chemical reaction of the slaked lime of mortar takes place.
* Left: Mix a teaspoon
full of slaked lime from the previous
experiment, one teaspoon full of sand. Add water to make a pulp
of lime mortar.
* Middle: Make a
stopper of an infusion bottle full of this lime mortar and keep it at the
air for some days.
Observation:
A hard and brittle substance is formed.
* Right: After adding
a drop of hydrochloric acid to the setted mortar gas bubbles can be seen.
This gas makes a drop of
lime water (placed above it) milky.