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TitleChemical and Physical Changes PurposeTo determine the differences between chemical and physical changes when they happen Materials Five test tubes Bunsen burner crucible test tube holder triple beam balance ring stand triangle evaporation dish wood splint copper turnings copper II nitrate dilute nitric acid BaNO32 Na2CrO4 FeCl3 KSCN AgNO3 ammonium dichromate safety goggles and matches Results1 Data table see attached page 2 Questions 1-3 1 A chemical change usually foams sparks explodes or lets off gas and it changes the substance into a compound A physical change will change color melt or evaporate but it will not change the substance 2 A physical change that seems like a chemical change is when I poured the FeCl3 and KSCN together because they were both clear but together they turned red 3 A chemical property is if a chemical or element has a reaction with another chemical element or heat A chemical change is the reaction the two or more substances have together to create a new compound Conclusion In this lab we conducted many experiments to see if chemicals and elements have a reaction together We were to determine if the reaction was chemical or physical change We were supposed to give examples to why they were chemical or physical changes Most of the chemical combinations led to a chemical change I think the best example of a chemical change was the ammonium dichromate experiment because it showed the most examples of change
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