2007-10-28 10:29:15 · 3 answers · asked by richiel101 2 in Science & Mathematics ➔ Earth Sciences & Geology
It means there is Calcium carbonate(CaCO3) present...such acid wlii normally react with limestone which is mostly CaCO3....hope this helps! :)
2007-10-29 06:55:13 · answer #1 · answered by Scottiegirl 2 · 0⤊ 0⤋
When the reaction between an acid and an unknown subtance results in "bubbling", the gas being produced is either hydrogen or carbon dioxide.
Hydrogen gas is produced when the acid reacts with an unreacted metal (like Sodium). It's rare to find an unreacted metal in nature. Iron, for instance, is found reacted with oxygen to give the substance bauxite Fe2O3.
By elimination that means the gas being produced is probably carbon dioxide. If you know carbon dioxide is being produced, and you know that it was formed by reacting hydrochloric acid with an unknown rock, the rock is probably an ionic compound containing carbonate ions.
For instance, reacting chalk (calcium carbonate) with hydrochloric acid produces water, carbon dioxide and calcium chloride:
CaCO3 + 2HCl ==> CO2 + H2O + CaCl2
2007-10-28 17:52:33 · answer #2 · answered by theBoyLakin 3 · 1⤊ 0⤋
there is an alkali present.
2007-10-28 17:35:59 · answer #3 · answered by Loren S 7 · 0⤊ 1⤋