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8.1 the secret language of chemical equations
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8.1 the secret language of chemical equations

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8.1 the secret language of chemical equations 8.1 the secret language of chemical equations Presentation Transcript

  • Formula Review
    • Every formula has two halves, a positive and a negative.
      • The positive is always written first.
    • Write the formula for Lithium carbonate.
      • Li 1+ CO 3 2-
      • Li 2 CO 3
    • If you still cannot write formulas you need to come in for help. All of semester two is based on this. It is not going to go away.
  • Don’t forget the diatomics
    • H, N, O, F, Cl, Br, and I
    • when not combined with another element in a compound will always be diatomic.
    • H 2 , N 2 , O 2 , F 2 , Cl 2 , Br 2 , I 2
  • Now its time for EQUATIONS
    • Sodium metal reacts with water to form aqueous sodium hydroxide and hydrogen gas.
    • WHAT?
    • Solutions of lead II nitrate and lithium iodide react to form solid lead II iodide and lithium nitrate solution.
    • AHHHHHH! MAKE IT STOP!
  • You need to learn…
    • The secret language of chemical equations.
  • Words that mean +
    • These words will be between formulas.
      • React
      • And
      • In the presence of
      • Combine
      • With
      • Dissolved in
  • Words that mean
    • These words divide the equation into two halves, the reactants and the products.
      • Form or to form
      • To produce
      • Yield or yields
  • States of matter
    • States of matter are also included in a chemical equation.
      • (s) = solid, metallic, crystal
      • (l) = liquid
      • (g) = gas, vapor
      • (aq) = aqueous, solution
  • Sample equation…
    • H 2(g) + O 2(g) H 2 O (l)
    • Look at the equation in parts:
      • Hydrogen gas
      • reacts with
      • oxygen gas
      • to form
      • liquid water
    • Lets look at those equations again…
    • Sodium metal reacts with liquid water to form aqueous sodium hydroxide and hydrogen gas.
    • Solutions of lead II nitrate and lithium iodide react to form solid lead II iodide and lithium nitrate solution.