Single displacement reaction in metals
The materials required for this science project:
- 6 beakers
- 6 spatulas
- Small metal pieces (at least 6 pieces each) – of copper, magnesium, iron, lead, silver, zinc
- Solution of copper sulfide, magnesium sulfide, iron chloride, lead chloride, silver nitrate and zinc sulfite
- 1 spotting tile
- 6 syringes
- 1 marker pen
1. For this science project, the independent variable is the type of metal and compound solution used. The dependent variable is the reaction between the metal and the compound. This is checked by observing for any chemical reaction between the metal and the compound. The constants (control variables) are the size of the metal strips and the concentration of the diluted compounds.
2. The beakers are marked with the names of the solutions - copper sulfide, magnesium sulfide, iron chloride, lead chloride, silver nitrate and zinc sulfite. The solutions are poured into the beakers accordingly.
3. Using the marker pen, the vertical columns of the spotting tile are marked as copper, magnesium, iron, lead, silver and zinc. The horizontal rows of the spotting tile are marked copper sulfide, magnesium sulfide, iron chloride, lead chloride, silver nitrate and zinc sulfite.
4. One metal piece is placed in each depression on the spotting tile according to the metal type marked earlier. For example the column marked copper will have 6 copper plates, one in each depression.
5. The compound solutions are marked along the horizontal rows. Using the syringe, a few drops of the compound solution is placed on the 6 different metal pieces placed in that row. Before taking the next compound solution, either wash the syringe or use another.
6. After all the compounds have been transferred to the spotting tile, observe for any chemical reaction. Mark ‘ Y ’ if there is a chemical reaction. ‘ X ‘ if no chemical reaction and ‘ – ‘ for same element type in the table given below.
Basic safety requirements.