Friday, March 8, 2019
Physical & Chemical Porperties of two Metals Essay
PurposeThe purpose of this science laboratory is to examine the strong-arm and chemic properties of Magnesium and Copper.Definitionschemical substance swapA chemical modification is a kind of change in which a specific type of matter is converted to a new one. animal(prenominal) change somatic changes are those in which a change in the form, except not the set roughly of matter occurs. sensual spacePhysical properties can be determined 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 signification undergoes a change in its composition. If you answer the question Can I get the original substance back? with no, then you are observant chemical properties.Physical and Chemical Properties of two Metals (Mg & Cu) info CollectionData CollectionObservations for Magnesium playObservationsa) Examine a effect of milligram train of thought.Silver in c omment, shiny and undisturbed surfaceb) Attempt to become a piece of milligram ribbon.Breaks easilyc) Obtain two 3 cm pieces of magnesium. Clean the surface of each with a piece of firebrand 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 test tube containing 3 mL of irrigate. summate two drops of phenolphthalein etymon and evoke for 30 seconds. eloquent turned in a cleared pinke) Using crucible tongs, hold the other piece of magnesium ribbon in a burner flame to flip ones wig the magnesium. Remove the fervent magnesium from the flame and allow it to continue to burn. tho the ignition for part f)Got bright, then melted and turned ovalbuminf) Place the ignition crossing from part e) into a test tube containing 3 mL of water. put up 2 drops of Phenolphtalein and shake for 30 seconds. liquifiedity turned in a light pink, ash is on the bottom of the test tubeAdd a 1 cm piec e of magnesium ribbon to a test tube containing 1 mL of 2.0 mol/L HCL and observe for 30 seconds.got warm, liquid is bubbling (new gas 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 sloven fit out.Bronze in color, smooth and shiny surfaceb) Attempt to bend a piece of cop wire.Does not break easilyc) Obtain two 3 cm pieces of copper wire. Clean the surface of each with a piece of blade 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, hol d the other piece of copper wire in a burner flame to ignite the copper. Remove 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 findAdd 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) windup/ EvaluationConclusion/EvaluationConclusionIn our try outs the magnesium seemed to take a leak reacted wear out in our investigates than the copper, although some of their physical properties are the same, both are for example shiny in their color and eat up a smooth surf ace..In three of our copper experiments no change took place whereas the magnesium 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 brand name wool and cleaned the surface of the magnesium and copper, physical properties were observed, the surface of both got unconstipated more smooth and it got more shiny.We were find 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 stripes, 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 unlike copper and magnesium react by doing several similar experiments with each of them, but I think in that location 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 might have been due to not comme il faut 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, whether 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 steps in good order with a high preciseness, more time would have been helpful, too.