how can you show the process of tooth decay by using marbles and dilute hydrochloric acid ?
Answers
Answer:
search-icon-header
Search for questions & chapters
search-icon-image
Question
Bookmark
A student dropped a few pieces of marble in dilute hydrochloric acid, contained in a test-tube. The evolved gas was then passed through lime water.
What change would be observed in lime water?
What will happen if an excess of gas is passed through lime water? With the help of balanced chemical equations for all the changes explain the observations.
Medium
Solution
verified
Verified by Toppr
Reaction involved-
CaCO
3
+2HCl→CaCl
2
+CO
2
+H
2
O
The evolved gas is carbon dioxide which when passes through lime water turns it milky.
Ca(OH)
2
+CO
2
→H
2
O+CaCO
3
⇐ due to formation of this compounds
when excess CO
2
is passed
CaCO
3
+H
2
O+CO
2
→Ca(HCO
3
)
2
Bicarbonate is formed which again clears the solution.
Answer:
The process of tooth decay can be shown chemically by using marbles which act as tooth and dilute hydrochloric acid which can be found in out stomach.
Explanation:
Our tooth is made up of calcium and marble is also chemically calcium carbonate i.e. CaCO₃. When we add dilute hydrochloric acid to marble or calcium carbonate it forms calcium chloride, water and carbon dioxide gas.
Chemical equation of this reaction is:
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂