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salt08 Limestone = A salt troublesome in households, useful in nature
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In your environment lime
stone appears in countless shapes: White fur in a kettle,
on a boiler, in a wash-basin, in the shower, building materials
not only for men but also for a huge number of different animals:
Left: Shells of snails
and mussels. Corals and numulites (Photo 2) are have also
houses made of limestone.
* Photo 2 an 3:
Houses
of numulites (and egg shells) are corroded by lemon juice (Experiment
w15).
* Photo 3: Kalk ist
ein Baustoff für Schneckenhäuser und Muschelschalen.
* Photo 4 and right:
Limestone of corals react with hydrochloric acid (HCl) producing a gas
that makes lime water milky.
Explanation:
The gas must be carbon dioxide [CO2], because lime
water is an indicator for this gas.
The gas carbon dioxide
was made from limestone, so this substance must be a compound containing
C and O.