Question

Take some calcium carbonate in a boiling tube, add dilute hcl acid in it what is the observation and inference?

Answer 1

Answer:

passing the evolving gas (CO2) through clear lime water, the water gets milky

Explanation:

When acids react with carbonates, carbondioxide gas is liberated

Answer 2

When HCl is added to carbonate, in this case, calcium carbonate, it is observed that carbonic acid is released which quickly turns into CO₂ gas.

• This reaction is endothermic and requires a heat supply for completion.

• When HCl is added to calcium carbonate (CaCO₃), effervescence is observed, which is caused due to CO₂ production. This is popularly known as limestone fizzling.

• It is observed that the amount of CaCO₃ decreases in presence of HCl. This continues till all the CaCO₃ present in the tube disappear.

• The inference is calcium carbonate CaCO₃ produces calcium salt CaCl₂, water H₂O and CO₂ effervescence.