hydrochloric acid were added into to each test tube and the changes were recorded. The last one, in two separate test tubes, were added 20 drops of calcium nitrate, and 20 drops of copper(II) nitrate. Furthermore, in each test tube were added 20 drops of dilute ammonium hydroxide, and the changes were recorded. Discussion
The physical properties results. 1. Boiling Point Bp of methyl alcohol (70.0°C) 64°C Bp of UNKNOWN # 2. Solubility of a Solid in Water Copper sulfate crystal and water. Soluble Calcium carbonate crystal and water. Insoluble 3. Solubility of a Liquid in Water Methyl alcohol and water Soluble Amyl alcohol and water Insoluble Chemical Properties results. 1. Reactions of Compounds. Procedures Observations Chemical Change/ Physical change. Ammonium bicarbonate +heat When it started to boil, there was a particular odor like ammoniac. Chemical Change Potassium bicarbonate + heat It was solid. There is nor any change. Physical Change 2. Reactions of Solutions Procedures Observations Chemical change/ Physical change Calcium nitrate + ammonium hydroxide White matter color. Ammoniac odor Physical Change Copper(II) nitrate + ammonium hydroxide Blue color. There were two different liquids, different colors into the test tube. Dark blue and transparent. Chemical change Conclusion
The purpose of the lab was to separate mixtures according to differences in physical properties of the components and classify the changes as either physical or chemical.
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