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Explain by Writing a Word Equation. - SSC (English Medium) Class 8 - Science

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Question

Explain by writing a word equation.

Lime stone powder disappears on adding to dilute hydrochloric acids.

Solution

Limestone is predominantly Calcium carbonate(CaCo3). 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 effervescence).

2HCl + CaCO3 → CaCl2 + CO2 + H2O

In this reaction, we add hydrogen ions (H+), which will react with the carbonate ion to form hydrogen carbonate HCO3- ions, which are soluble in water and the limestone will dissolve.

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APPEARS IN

 Balbharati Solution for Balbharati Class 8 Science - General Science (2018 to Current)
Chapter 13: Chemical Change and Chemical Bond
Exercise | Q: 2.3 | Page no. 94
Solution Explain by Writing a Word Equation. Concept: Chemical Changes in Everyday Life.
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