reactions

• Displacement reaction occurs when one element replaces another element in a compound
• The more reactive element displaces the less reactive one, forming a new compound and releasing the displaced element
• Combustion is a chemical reaction between a substance and oxygen
• In organic compounds, combustion with oxygen produces carbon dioxide and water as the main products
• Reactivity series is a list of metals arranged in order of decreasing reactivity
• High reactivity metals tend to lose electrons more readily and react more vigorously with other substances
• Examples of highly reactive metals are Potassium (K) and Sodium (Na)
• Highly reactive metals react vigorously with water, producing hydrogen gas and hydroxide ions
• Moderately reactive metals don't react as readily as highly reactive metals but are more reactive than low-reactivity metals
• Example of a moderately reactive metal is Iron (Fe)
• Iron reacts with acids to produce hydrogen gas but doesn't react as vigorously with water
• Low reactivity metals are stable and do not readily lose electrons or react with acids and water
• Examples of low-reactivity metals are Gold (Au) and Silver (Ag)
• Gold and silver do not corrode easily and are often found in their elemental state in nature
• Oxidation reaction:

  • Hydrogen is removed
  • Oxygen is added
  • There is a loss of electrons
• Reduction reaction:

  • Hydrogen is added
  • Oxygen is removed
  • There is a gain of electrons
• Combustion is the burning of a hydrocarbon that releases high amounts of energy and heat
• Combustion releases energy and heat by breaking down the hydrocarbon molecules and forming new compounds like carbon dioxide and water