From Copper to Copper 3
From Copper to Copper
Raymond Chan
SCH3U1-02
Ms. Moledina
October 2014
Purpose
To study reactions of copper, and also to recognize that change of state, change in color, formation of a precipitate, or the evolution of heat are associated with a chemical change.
Procedure
1. A table for all the reactions in the lab was drawn and observations were recorded, except for reaction A. The blue basket with all of the chemicals, metals, and tools necessary were obtained.
2. 3mL of copper(II) nitrate was measured in a test tube, then poured into an Erlenmeyer flask. While stirring with a glass rod, sodium hydroxide was added drop by drop from a dropper, until red litmus paper turned red when touched with the rod dipped in the mixture.
3. While constantly stirring the solution with a glass rod to prevent burning, the mixture was heated on a hot plate on power 4 until a black precipitate was formed.
English: Erlenmeyer flask Deutsch: Erlenmeyer Kolb...
English: Author: John Dalton; Year: 1808
English: 96% sulfuric acidA wash bottle was used to wash any light blue precipitate sticking to the flask, while using a scoopula to hold the black precipitate.
4. Flask was cooled in an ice and water bath for several minutes.
5. While stirring the solution, sulphuric acid was added drop by drop from a dropper until all the black precipitate was dissolved.
6. 1g of zinc was weighed and then crushed into smaller pieces using a mortar and a pestle. The zinc was added into the solution of copper(II) sulphate, which was stirred until all the blue colour disappeared.
7. Using ad dropper, sulphuric acid was added drop by drop while stirring the solution. The liquid was decanted into a waste container, and the copper was kept in the flask in with a scoopula.
8. Copper metal was washed carefully with...