Physical & Chemical Porperties of two Metals Essay

PurposeThe purpose of this lab is to examine the physical and chemic properties of Magnesium and Copper.DefinitionsChemical changeA chemical change is a kind of change in which a ad hoc type of matter is converted to a new one. visible changePhysical changes are those in which a change in the form, hardly non the composition of matter occurs.Physical propertyPhysical properties can be spy or measured without changing the composition of matter, they are generally used to observe and describe matter.Chemical propertyChemical properties can not be determined unless a substance undergoes a change in its composition. If you answer the question Can I get the original substance back? with no, and then you are observing chemical properties.Physical and Chemical Properties of two Metals (Mg & Cu) data CollectionData CollectionObservations for MagnesiumProcessObservationsa) Examine a tour of magnesium laurel wreath.Silver in color, shiny and calm surfaceb) search to bend a piece of m agnesium decoration.Breaks easilyc) Obtain two 3 cm pieces of magnesium. Clean the surface of distributively with a piece of steel wool.Still silver in color, still shiny but became to a greater extent smoothd) Place one of the pieces of magnesium ribbon from part c) into a canvass tube containing 3 mL of water. Add two drops of phenolphthalein solution and shake for 30 seconds.Liquid turned in a light pinke) Using crucible tongs, toy with the other piece of magnesium ribbon in a burner flame to ignite the magnesium. Remove the burning magnesium from the flame and allow it to continue to burn. keep the ignition for part f)Got bright, then melted and turned clean-livingf) Place the ignition product from part e) into a canvass tube containing 3 mL of water. Add 2 drops of Phenolphtalein and shake for 30 seconds.Liquid turned in a light pink, ash is on the bottom of the test tubeAdd a 1 cm piece of magnesium ribbon to a test tube containing 1 mL of 2.0 groyne/L HCL and observe for 30 seconds.got warm, liquid is bubbling (new splatter created), the piece of magnesium ribbon turned whiteAdd a 1 cm piece of magnesium ribbon to a test tube containing 1 mL of 2.0 mol/L nitric acid and observe for 5 minutes.Liquid is bubbling (new gas created), Liquid turned cloudy, got warmPhysical and Chemical Properties of two Metals (Mg & Cu) Data CollectionData CollectionObservations for CopperProcessObservationsa) Examine a piece of horseshit wire.Bronze in color, smooth and shiny surfaceb) Attempt to bend a piece of hog wire.Does not break easilyc) Obtain two 3 cm pieces of crap wire. Clean the surface of each with a piece of steel wool.Bronze in color, shiny and very smoothd) Place one of the pieces of copper wire from part c) into a test tube containing 3 mL of water. Add two drops of phenolphthalein solution and shake for 30 seconds.Liquid turned cloudy/whitee) Using crucible tongs, hold the other piece of copper wire in a burner flame to ignite the copper. Remov e the burning copper from the flame and allow it to continue to burn. Save the ignition for part f)Got warm, color of liquid turned grey, copper wire bends easilyf) Place the ignition product from part e) into a test tube containing 3 mL of water. Add 2 drops of Phenolphtalein and shake for 30 seconds.No changes observedAdd a 1 cm piece of copper wire to a test tube containing 1 mL of 2.0 mol/L HCL and observe for 30 seconds.No changes observedAdd a 1 cm piece of copper wire to a test tube containing 1 mL of 2.0 mol/L nitric acid and observe for 5 minutes.No changes observedPhysical and Chemical Properties of two Metals (Mg & Cu) Conclusion/ EvaluationConclusion/EvaluationConclusionIn our experiments the magnesium seemed to rich person reacted better in our experiments than the copper, although some of their physical properties are the same, both are for example shiny in their color and have a smooth surface..In three of our copper experiments no change took place whereas the magne sium always showed some kind of reaction to our experiment.But magnesium and copper do also seem to have some reactions in common, as to see at experiment D, where we took steel wool and cleaned the surface of the magnesium and copper, physical properties were observed, the surface of both got even more smooth and it got more shiny.We were observing a physical change in part C where the magnesium stripe broke easily, but the copper did not break easy at all.We were also observing chemical changes such as the boiling of the magnesium in experiment F, a new gas was created.Physical properties were observed in experiment E for the magnesium as well as the copper where the phenolphthalein and the water changed its color to pink with the magnesium and in a cloudy white with the copper stripe, meaning that magnesium, water and phenolphthalein or copper, water and phenolphthalein do change the color of the created.We did not observe any changes in experiments G,H and I for our copper strip es, whereas we observed changes in experiment H for the magnesium part where the liquid started bubbling, a new gas was thus created which is evidence for a chemical change.EvaluationThis experiment showed very well how different copper and magnesium react by doing several similar experiments with each of them, but I think there is a lot of room for improvement because I am quite sure that there are either changes or specific properties occuring in parts G to I with the copper.The fact that no reaction took place king have been due to not enough liquid for those experiments, it might have been helpful to either add more or do several trails with each one having a different value of liquid in it.In general it is always better to have numerous trails, this would give us better evidence about changes which might not have been regular, but occured due to unpreciseness when doing the experiments.It might have also been interesting to measure the temperature of the boiling liquid, whethe r or not there is a difference between the reaction with copper and magnesium or not.We only had about 40 minutes to complete our entire experiment, which was, in my oppinion, not enough time to complete all move properly with a high preciseness, more time would have been helpful, too.