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College aantekeningen
Chemical Reaction
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---2augustus 20252025/2026
- What is a Chemical Reaction? 
 
A process in which one or more substances (reactants) are converted into new substances (products). 
 
Indications of a chemical reaction: 
 
Change in state (solid, liquid, gas) 
 
Change in color 
 
Evolution of gas 
 
Change in temperature or energy 
 
Example: 
 
Mg 
+ 
O 
2 
→ 
MgO 
Mg+O 
2 
	​ 
 
→MgO 
 Chemical Equation 
 
Representation of a reaction using symbols and formulae. 
 
Example: 
 
Zn 
+ 
H 
2 
SO 
4 
→ 
ZnSO 
4 
+ 
H 
2 
Zn+H 
2 
	​ 
...
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