Write a balanced equation for the reaction – between limestone and carbonic acid in rainwater – that gives rise to temporary hardness in the water. - Leaving Cert Chemistry - Question i - 2019
Question i
Write a balanced equation for the reaction – between limestone and carbonic acid in rainwater – that gives rise to temporary hardness in the water.
Worked Solution & Example Answer:Write a balanced equation for the reaction – between limestone and carbonic acid in rainwater – that gives rise to temporary hardness in the water. - Leaving Cert Chemistry - Question i - 2019
Step 1
Step 1: Identify the Reactants
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Answer
The reactants in this reaction are limestone, which is primarily composed of calcium carbonate ( ext{CaCO}_3), and carbonic acid ( ext{H}_2 ext{CO}_3).
Step 2
Step 2: Write the Unbalanced Equation
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Answer
The unbalanced chemical equation for this reaction can be written as:
extH2extCO3+extCaCO3→Ca(HCO3)2
Step 3
Step 3: Balance the Equation
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Answer
As both sides of the equation have the same number of each type of atom, this equation is balanced as written. Thus, the final balanced equation is:
extH2extCO3+extCaCO3→Ca(HCO3)2
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