Types of Reactions
This reaction combines two substances to form one product.
What is a synthesis reaction?
Why must chemical equations be balanced?
What is the Law of Conservation of Mass?
A solid forms from a solution.
What is a precipitate?
2Na + Cl₂ → ?
What is 2NaCl?
A reaction that absorbs energy.
What is an endothermic reaction?
This reaction breaks one compound into simpler substances.
What is a decomposition reaction?
Balance: H₂ + O₂ → H₂O
What is 2H₂ + O₂ → 2H₂O?
Bubbles forming during a reaction indicate this.
What is gas production?
HCl + NaOH → ?
What is NaCl + H₂O?
A reaction that releases energy.
What is an exothermic reaction?
This reaction involves swapping ions between two compounds.
What is a double replacement reaction?
Balance: N₂ + H₂ → NH₃
What is N₂ + 3H₂ → 2NH₃?
A sudden color change is an example of this.
What is evidence of a chemical reaction?
CaCO₃ → ?
What is CaO + CO₂?
Energy needed to start a reaction.
What is activation energy?
A reaction where one element replaces another in a compound.
What is a single replacement reaction?
Balance: Fe + O₂ → Fe₂O₃
What is 4Fe + 3O₂ → 2Fe₂O₃?
Heat released during a reaction indicates this type.
What is an exothermic reaction?
Zn + HCl → ?
What is ZnCl₂ + H₂?
The total energy of reactants vs products determines this.
What is energy change (enthalpy)?
This reaction involves oxygen and produces CO₂ and H₂O.
What is a combustion reaction?
The number placed in front of a formula to balance it.
What is a coefficient?
Light produced during a reaction is another sign of this.
What is a chemical change?
AgNO₃ + NaCl → ?
What is AgCl + NaNO₃?
A diagram showing energy changes in a reaction.
What is a potential energy diagram?