Home 9.1c Balancing Chemical Equations

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9.1c Balancing Chemical Equations

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SUMMARY

Based on the principle of the conservation of mass, atoms are neither created nor destroyed in a chemical reaction. A chemical equation reflects with principle when it is balanced such that the number of atoms present as reactants equals the number of atoms found as products. Duration: 8:40.

 

VIDEO CHECK QUESTIONS

1. What is a first rule of thumb for balancing chemical equations?
2. Why can’t you add a subscript to balance a chemical equation?
3. How do you know if a chemical equation is balanced or not?

To optimize your learning, try answering the above video check questions on your own before scrolling down to view the author's answers.





1. What is a first rule of thumb for balancing chemical equations?
[Focus on one element at a time.]
2. Why can’t you add a subscript to balance a chemical equation?
[Because if you change a subscript, you are changing the identity of the material.]
3. How do you know if a chemical equation is balanced or not?
[If there are the same number of atoms on the reactant side as there are on the product side, then the equation is balanced.]

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