C4-quantitative chemistry

Cards (9)

  • Concentration
    •increased when mass of solute increased + volume kept the same
    •decreased when volume of solution increased + mass kept the same
  • Moles equations
    • Mass(g)/Mr,Ar
    • Concentration (mol/dm³) × volume (dm³)
  • Reasons for not achieving 100% yield
    • Some product lost when separated from reaction mixture
    • Some reactants may react differently to expected so different products
    • Reversible reactions
    • may not go to completion
  • Percentage yield
    Actual mass/maximum theoretical mass × 100
  • Why atom economy is important
    • Saves money - minimises waste
    • Increases sustainability - by not wasting
  • Percentage atom economy
    Mr of desired product/sum of Mr's of reactants × 100
  • 1 mole of gas
    • Volume of 24dm³
    • @ room temp = 20°c
    • @ room pressure = 1 atmosphere
  • Volume of gas (dm³)
    Moles × 24
  • Avogadro's constant
    6.02 × 10²³