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Nhen the following equation is balanced, what is the coefficient in front of the HCl ? \[ \mathrm{HCl}+\mathrm{CaCO}_{3} \rightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \]

Ask by Chandler Dickson. in the United States
Feb 25,2025

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The coefficient in front of HCl is 2.

Solución

To balance the equation   HCl + CaCO₃ → CaCl₂ + H₂O + CO₂, first, balance the chlorine atoms. Calcium chloride (CaCl₂) on the right contains 2 chlorine atoms. To supply 2 chlorine atoms on the left, you need 2 molecules of HCl. Thus the balanced equation is:   2 HCl + CaCO₃ → CaCl₂ + H₂O + CO₂. The coefficient in front of HCl is 2.

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When balancing the equation, you'll want to ensure that the number of atoms for each element is the same on both sides. Here’s the balanced equation: \[ 2 \mathrm{HCl} + \mathrm{CaCO}_{3} \rightarrow \mathrm{CaCl}_{2} + \mathrm{H}_{2} \mathrm{O} + \mathrm{CO}_{2} \] So, the coefficient in front of HCl is 2! Balancing reactions can sometimes feel like a fun puzzle, don’t you think? Keep practicing!

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