Explain by writting a word and
chemical equation
I Photosynthesis
ii Limestone powder disappearson
adding hydrochloricacid
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Lime stone powder disappears on adding to dilute hydrochloric acids.
Limestone is predominantly Calcium carbonate (CaCO
3
). When calcium carbonate reacts with 10% solution of HCl. Then Calcium chloride is formed as a salt along with water and carbon dioxide gas (brisk effervescene).
2HCl+CaCO
3
⟶CaCl
2
+CO
2
+H
2
O
In this reaction, we add hydrogen ions (H
+
), which will react with the carbonate ion to form hydrogen carbonate HCO
3
−
ions, which are soluble in water and the limestone will dissolve.
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