NaOH + Pb(NO3) 2 Pb(OH) 2 + NaNO3
ORDER:1. Balance metals2. Balance non-metals3. Balance oxygen 2nd last4. Balance hydrogen last
Tip for balancing equations:
6 Basic Types of Reactions
1. Combination (Synthesis)2. Decomposition3. Single replacement4. Double replacement5. Neutralisation 6. Combustion
Combination Reactions
• reactants join together to form a single product
Magnesium burns in Oxygen
Decomposition Reactions
Products split to form 2 or more reactants
Electrolysis of water
Decomposition of Hydrogen Peroxide
Single Replacement Reaction
A single compound replaces one element for another(ie. Metals swap positions)
AB + C AC + B
Hydrochloric Acid with Mg metal
Double Replacement ReactionWhen two ionic compounds swap ions with each other (eg. Cation with cation)
AB + CD AD + CB
Potassium iodide and lead nitrate
Neutralisation Reaction
• A special type of double replacement reaction involving an acid and base to form an ionic salt and water
• Eg. HBr + LiOH
Combustion Reaction
Gasoline vs Diesel
Balance the reaction:
hexane + oxygen carbon dioxide + water
C6H14 (l) + O2 (g) CO2 (g) + H20 (g)
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