Chemical equations must be balanced!
Basically, this means that chemical equations must be consistent with the law of conservation of mass:
In the context of an ordinary chemical reaction, conservation of mass means that atoms are neither created nor distroyed. This requirement is easily met by making sure that there are equal numbers of all atoms on both sides of the equation.
Pair/Share 1 (3 min)
Answer the questions:
1, Write and balance the following chemical equation:
calcium hydroxide + sulfuric acid ---> calcium sulfate + water.
2.What are the correct coefficients to balance the equation:
FeCl3 + KOH --->
3. Balance the equation by showing the correct coefficients successively.
K + O2 --->
IV. Home task: make 5 questions
Reflection:
Name one thing you would like to know more
Give one thing which you find difficult
Name one thing you liked most.
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