Copper Silver And Nitrate
When you mix copper, silver, and nitrate together, you will end up with silver nitrate solution will turn blue (it has become copper nitrate). On the piece of copper, there would be a coating of solid silver. If a chemical reaction is going to be observed when chemicals are mixed, heated or any other means of altering the substance, then we will be able to predict the products formed. If it is observed that in the original versus the changed substance no new substances are formed, the change is reversible, no energy is taken or given off, the chemical properties didn’t change, then it can be concluded that a physical change has taken place.
A homogenous mixture has the same uniform appearance and composition throughout. A heterogeneous mixture
consists of visibly different substances or phases. When you place copper wire in a silver and nitrate solution, it is an example of heterogeneous mixture. Throughout the experiment, the physical change can conclude by the solution AgNO3 change from clear to blue. Chemically change will be the silver nitrate is in solution and the metallic copper will dissolve to form copper nitrate; as it does so, the silver in solution will be precipitated out as metallic silver. That is, the silver in solution is exchanged for copper and the copper that is not in solution is substituted for silver.
Close to the end of this experiment, the crystal layer around the wire is getting thicker, plus the solution is turn to dark blue instead of blue. We did a small flame test after the lab. The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner.We put the paperclip into the flame, the outcome is the blue-green color. Blue-green color represent halide copper. Once put the paperclip down to the AgNO3 solution, the silver paperclip will come off. Flame test can be conclude with chemical change, because when heat is involving, it is a chemical change. On another hand, flame test can also conclude with physical property, because When you light the element there is lots of energy, so these electrons go into a higher sphere, but only for a very short time, then they fall back into the sphere they were in before. Plus, the light has different wavelength, and we can see light of different wavelengths as colors.
A homogenous mixture has the same uniform appearance and composition throughout. A heterogeneous mixture
consists of visibly different substances or phases. When you place copper wire in a silver and nitrate solution, it is an example of heterogeneous mixture. Throughout the experiment, the physical change can conclude by the solution AgNO3 change from clear to blue. Chemically change will be the silver nitrate is in solution and the metallic copper will dissolve to form copper nitrate; as it does so, the silver in solution will be precipitated out as metallic silver. That is, the silver in solution is exchanged for copper and the copper that is not in solution is substituted for silver.
Close to the end of this experiment, the crystal layer around the wire is getting thicker, plus the solution is turn to dark blue instead of blue. We did a small flame test after the lab. The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner.We put the paperclip into the flame, the outcome is the blue-green color. Blue-green color represent halide copper. Once put the paperclip down to the AgNO3 solution, the silver paperclip will come off. Flame test can be conclude with chemical change, because when heat is involving, it is a chemical change. On another hand, flame test can also conclude with physical property, because When you light the element there is lots of energy, so these electrons go into a higher sphere, but only for a very short time, then they fall back into the sphere they were in before. Plus, the light has different wavelength, and we can see light of different wavelengths as colors.