State symbols and phase changes

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  1. Building on chemical equations
  2. Chemical and physical changes.
  3. Chemical phases and state symbols.
  4. Other key phase/state language.
  5. Phase changes.
  1. Recall the different states of matter from descriptions of chemicals.
    Write "solid", "liquid", "gas", or "aqueous", next to each term below to show which state it is describing.
    1. Powder
    2. Solution
    3. Vapour
    4. Crystals
    5. Gaseous
    6. Precipitate
  2. Write full chemical equations using information from descriptions of laboratory experiments.
    Read the following experiment notes and write a balanced chemical equation, with state symbols, to describe what is happening.
    1. Strips of magnesium were weighed out and placed in a beaker. Shortly afterwards, a solution of hydrochloric acid was added to the beaker to produce magnesium chloride (MgCl2_2) and gaseous hydrogen.
    2. In a reaction vessel, chlorine gas reacts with chunks of sodium metal to form sodium chloride in a reaction releasing a lot of heat energy.
    3. When hot steam is passed over iron filings, gaseous hydrogen and solid iron oxide is produced.
    4. Aqueous hydrochloric acid and sodium carbonate (Na2_2CO3_3) powder react to form sodium chloride in solution, water and bubbles of carbon dioxide.