Or and example of Precipitation or An endothermic reaction or a physical change
2007-01-19 23:12:51 · 6 answers · asked by Yousaf Mahmood 1 in Science & Mathematics ➔ Chemistry
Acid + Carbonate = Salt + carbon dioxide + water.
A carbonate being neutralized by an acid.
2007-01-20 06:52:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1, Exothermic (if you ever try this reaction, it will get hot)
2, The reaction is neutralising the acid
3, CO2, H2O and CaCl2 are created
4, Not precipitation or a physical change (because it is a chemical change)
5. Not Endothermic
2007-01-20 08:03:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Chalk = calcium carbonate = CaCO3
When chalk is in contact with hydrochloric acid (HCl), effervescence is formed due to the production of carbon dioxide (CO2).
CaCO3 + 2HCl --> CaCl2 + H2O + CO2
This is a chemical reaction.
2007-01-20 08:11:41 · answer #3 · answered by Kemmy 6 · 0⤊ 0⤋
i suppose you mean 'chalk'.
ok, u have to understand that chalk is just a form of calcium carbonate.
when calcium carbonate combines with hydrochloric acid, carbon dioxide gas is released. thus the effervescence.
a physical change is also taking place because the solid chalk (calcium carbonate) is turned to aqueous and gaseous products.
this is not a precipetation reaction and i think it should be an exothermic reaction. however, i could be wrong about the exo-endo part. check it up
2007-01-20 02:23:32 · answer #4 · answered by amandac 3 · 0⤊ 0⤋
It's really a neutralisation reaction. The chalk (calcium carbonate) neutralises the hydrochloric acid.
CaCO3 + 2HCl --> CaCl2 + H2O + CO2
2007-01-20 04:12:28 · answer #5 · answered by Elaine 2 · 0⤊ 0⤋
that's both effervescence n precipitation
hydrogen and if i m right carbon di oxide effervates
side by side calcium chloride is precipitated.
2007-01-20 00:08:26 · answer #6 · answered by Arjun V 2 · 0⤊ 0⤋