21.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process
If so, write the chemical equation involved.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process
If so, write the chemical equation involved.
Answers & Comments
Answer: i. it's a chemical change
ll. Yes
Explanation: i. Because new substance are formed according to the definition of chemical change
ii. CaO is formed alongside CO2
the equations are
CaO + H2O - Ca(OH)2 which is basic
CO2 + H2O - H2CO3 which is acidic
Answer:
(a) yes
Explanation:
(a) The phenomena given in question is a chemical change because the composition of product formed is different from the substance taken. The reaction involved is (b) Yes When CaO dissolves in water it forms calcium hydroxide which is basic solution. (ii) When (g) dissolves in water it forms carbonic acid which is acidic solution.
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