Chemistry Lab Chemical and Physical Properties

Lab 4 PHYSICAL AND CHEMICAL PROPERTIES PURPOSE To find out which of these substances will cause a physical or chemic transfer. To document the different physical and chemic turns. DATA SOLUBILITY OR REACTIONSubstancename Color Odor Effect Of heat glacial H2O Hot H2O Litmus Strip Dilute HCl Dilute NaOH Mg Shinny SilverFlakes none Turned darker, less shinny No careen No channelise No change wet dot Bubbled, steamed, same shape None Cu CopperBe be None Turned shinier No change No change No change wet dot No change None Zn Shinny Silver Pieces None Shinier & darker No change Less shinny No change wet dot Warm steam bubbles dull in emblazon None MgO Off- whitePowder None Little darker color Turned water supply milky & slightly dissolved Separated Red turned blue, blue no change Hot dissolved turned chickenhearted None CuCO3 Light green powder None Turned to black powder Turned water green stayed separate Separated No change wet dot Bubbled dissolved turned b right green Turn blue Cu(NO3)2 Bright blue crystals None Turned turquoise & to a thickset liquid Water light blue, separate Dissolved, blue water Blue turned red, red no change Turned green, stayed separate None NaCl light crystals None No change Stayed separate Dissolved, water clear Red no change, blue dark dot No change separate None OBSERVATION I didnt smell a difference in any except when heated or mixed with HCl. The best changes happened with the HCl, and hot water. It was arouse to see what changed with what and how. CALCULATIONS None CONCLUSION The CuCO3 had the most changes with all the experiments. It was cool to see the chemical and physical changes. I saw color changes and solid to liquid changes. single three had changes on the litmus paper. There was only one change with the dilute NaOH. The changes were different than I expected physically and chemically. QUESTIONS A.Did you observe any chemical changes in this experiment? Yes there were a lot of chemical c hanges with the HCl, one with the NaOH, and some with heat and hot water. B. What evidence did you use to decide that something was a chemical change? The starting and ending product were different, color change, sound, heat, and gas production. C. Give at least two examples of chemical changes you observed HCl and CuCO3 turned bright green, NaOH and CuCO3 D. furcate the following properties of sodium metal as physical or chemical * Silver metallic color chemical * Turns gray in air chemical * Melts at 98*C physical * Reacts explosively with chlorine gas chemical E.Classify the following changes as physical or chemical * Water freezes at O*C physical * Baking soda when combined with vinegar produces bubbles chemical * Mothballs gradually disappear at room temperature chemical * Ice cubes in freezer get smaller with time chemical * Baking soda loses mass as its heated chemical * Tarnishing of silver chemical F. How would you show that licentiousness table salt is a physical change ? When you dissolve salt it is a chemical change because it dissociates in Na+ ions and Cl- ions. But when you remove the water then the salt remains which is physical change. (http//chemistry. about. com/od/matter/a/lsdissolving-salt-in-water-a-chemical-change-orphysical-change. htm )