CHEMISTRY FORM 4

CHAPTER 2 F4: STRUCTURE OF ATOM .

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CHAPTER 3 F4: CHEMICAL FORMULA AND  EQUATION.


EMPIRICAL FORMULA.
       REACTANT: METAL
        i) USING CRUCIBLE LID.....
           direct heating with excess oxygen......if reactant given was reactive metal.
            (must be metal not metal oxide)
               * always given was magnesium metal.
      REACTANT: METAL OXIDE
       i) USING COMBUSTION TUBE( heating tube).......
          - reducing with dry hydrogen gas.......if given was metal oxide from uncreative metal
            (must be metal oxide)
            * always given was copper(II)oxide, lead(II)oxide
         - reducing with carbon (coal).
               * always given was zinc oxide.

    

2. SALT
   A) Test chemically the presence of all anions?
          i) Put the______ solution into the test tube.
          ii) Add ________ solution into the test tube.
          iii) Add ________ solution into the test tube. (option is 2 chemical tester used)
          iv) If _______ formed that shows the presence of _____ ion.