Slide 1

Matter PBL projectby: Zana Rodgers, Grace Oregan, Micheal Richardson, Veronica Rincon.Unknown #2Physical Property experiment: We believe as a group that unknown #2 is ammoniaWe are using density to test our assumption. The known density of ammonia is 0.73 kg/m.We found our unknown had a mass of 32.32g we measured about 30mLUsing the formula D = M/V we got the answer 0.93 g/mL which is similar to the known value.Density is an intensive property.

Unknown #23 physical properties we observed:1. Strong unpleasant odor (intensive)2. Has a clear color (intensive)3. Low viscosity (intensive) Ammonia is a pure substance.

Unknown #2Chemical property: If you mix ammonia gas with hydrochloric acid it will create a chemical reaction which results in smoke.This is a link that shows this chemical reaction: http://www.youtube.com/watch?v=M7eUA9Ldfv8Unknown #19Physical property experiment: We as a group agree that unknown #19 is copper. We are usingbuoyancy to test if we are correct.It is known that copper does not float.We tested this by putting the copper in a measuring cup and observing what happened, as expected the metal sank. Buoyancy is an intensive property.3 Physical properties we observed of unknown #19:Easy to bend and flexible (intensive)Copper coloring (intensive)Has the appearance of a metal (intensive)Copper is a pure substance.

Unknown #19Chemical property: If you put copper into an active flame, the flame will turn green which is a result of the copper burning.Below is a link to show this chemical process: http://www.youtube.com/watch?v=OcNqwiY_ScoUnknown #6Physical property test: We as a group made an assumption that unknown #6 was a mixture of soap and water.We will test to see if we are correct by observation of viscosity of unknown substance #6 compared to water. It is known that water and soap have low viscosity. Viscosity is an intensive property.

Unknown #63 Physical properties we observed of unknown#6:White/cream colored (intensive)Smells like soap (intensive)Low viscosity (intensive)Unknown #6 is a mixture.

Unknown #6Chemical property: Soap and water should boil just like regular water would.Below is a link to a video to show this: http://www.youtube.com/watch?v=Gey4mmrG9cc

Unknown #5Physical property experiment: We agree as a group that unknown #5 is water.We are using density to see if we are correct.The known density of water is 1,000.00 kg/mThe mass of unknown #5 is 13.2g and we measured 12.9mLUsing the formula formula D = M/V we got the answer 0.98g/mL which is extremely close to the known value of water.Density is an intensive property.3 Physical properties we observed of unknown #5:Clear color (intensive)Low viscosity (intensive)No odor (intensive)Water is a pure substance.

Unknown #5Chemical property: If water comes into contact with the metal iron it will cause a chemical reaction known as rust.Below is a video explaining this chemical reaction: http://www.youtube.com/watch?v=cn_Vom--b4AUnknown #13Physical property experiment: We agree as a group that unknown #13 is salt.We are testing to see if we are correct by using solubility.We put unknown #13 in a measuring cup of water to see if it would dissolve, as we expected it did.Solubility is an intensive property.3 Physical properties we observedof unknown #13:Grainy texture (intensive)No odor (intensive)White coloring (intensive)Salt is a pure substance.

Unknown #13Chemical property: If you mix salt and coca cola a small eruption will occur and will fizz up.Below is a link to show this chemical reaction: http://www.youtube.com/watch?v=-e_BsxHwzcM