Reaction Rookie
WHat are the starting substances of a chemical reaction called?
Reactants.
Two substances combine to form one product. Name the reaction type.
Synthesis.
What gas forms when baking soda and vinegar react?
Carbon dioxide (CO₂).
Balance: H₂ + O₂ --> H₂O
2H₂ +O₂ --> 2H₂O.
True or False: Rusting iron is a chemical reaction.
True.
What are the substances formed by a chemical reaction called?
Products.
One compound breaks into simpler substances. Name the reaction type.
Decomposition.
What visible evidence occurs when baking soda reacts with vinegar?
Bubbling or fizzing due to gas production.
Balance: Na + Cl₂ --> NaCl
2Na + Cl₂ --> 2NaCl
What two products form when pentane burns completely in oxygen?
Carbon dioxide and water.
WHat does the arrow (-->) mean in a chemical equation?
Yields or produces.
A substance reacts with oxygen and burns. Name the reaction type.
Combustion.
What is the solid formed when potassium carbonate reacts with calcium chloride called?
A precipitate.
Balance: N₂ + H₂ --> NH₃
N₂ + 3H₂ --> 2NH₃
What gas forms when sodium reacts with water?
Hydrogen gas (H₂).
What does the large number 2 mean in 2H₂O?
There are two water molecules (or two moles of water, depending on context).
Zn + CuSO₄ --> ZnSO₄ + Cu. What type of reaction is this?
Single replacement.
Which metal did we place in copper (II) sulfate solution during the activity for Lab 7?
Zinc.
Balance: Fe + O₂ --> Fe₂O₃
4Fe + 3O₂ --> 2Fe₂O₃
Iron reacts with oxygen to form iron (III) oxide. What type of reaction is it?
Synthesis.
Why do chemical equations need to be balanced?
Because atoms are conserved in a chemical reaction.
K₂CO₃ + CaCl₂ --> CaCO₃ + 2KCl. What type is this?
Double replacement.
What metal is produced when zinc reacts with copper (II) sulfate?
Copper (Cu).
Balance: C₂H₄ + O₂ --> CO₂ +H₂O
C₂H₄ +3O₂ --> 2CO₂ + 2H₂O
Cu(OH)₂ --> CuO + H₂O. What type of reaction is this?
Decomposition.