Physical & Chemical Properties

Physical and Chemical Properties Pre Lab Questions (4pts. ) 1. What are the learning goals of this experiment? The goals are to investigate the chemic properties of pure chemical substance and to investigate the physical properties of pure substances. 2. Write two examples each of physical and chemical properties. Physical Color, Odor, hardness, density, melting point, boiling point Chemical- incite of combustion, reactivity, ph, 3. What happens if you affectionateness a resolve of chemicals in taste furnish facing towards you?How would you avoid inhalation of chemical vapor during heating in a test tube? It could splat on face and burn you. The best way to avoid inhaling vapor is to either where a mast or dont breathe immediately in the vapors while the substances is burning. 4. How would you take care of itching eyelids or body parts caused by the contamination of 6M HCl? Wash your eyes with cold peeing immediately and if get any worse call 911. Date______10/28/12__________ __________ Name____Daniel Asonye _____________________ . Title Physical and Chemical Properties 2. Procedure (3pts. ) 1. The first thing that essential be done is to half fill one well of 24-well plate with 6M HCL and half filled a game well of the 24-well plate with 6M NaOH. 2 The second thing to do is to place 4 smalls test tubes into wells of the 24 well plate. Than place a small amounts of the substances into the tube that needs to be time-tested in each of the four micro test tube. 3 In the first tube, adopt and express color and odorThe next thing lights the burner and grab the test tube with the holder. Next heat the sample by slowly moving it just above the flame. Watch the effect of the substance by the heat. Allow chill before storing. 4 For the second tube 1. Add enough cold water at least ? about the sample and stir with the rod and watch what happens. Light the burner and grasp the test tube with the holder and heat the sample by slowly moving the tube about the flame. Use the ? cm of exit and blue litmus paper.Allow the solution to cool and stir with the rod and transfer a drop of the solution onto a piece of litmus paper. 5 For the third base tube Just add a few pipet drops of HCL to the sample and stir. 6. Fourth test tube- just add a few piped drops of NaOH to the sample. Stir and record 7. Clean up all four test tube and repeat steps 2 through 6. 3. Data Collection Fill up the bow as shown in procedure (12pts. ) Color Odor Effect of heat Cold H2O Hot H2O Litmus Test Dilute HCL DiluteNaOH Mg silver nc Cu gold nc Dissolves quickly Dissolves slowly Slighty cloudy Blue-white color appears Red -none Zn silver none Starts boiling Mgo white none uncontaminating precipate forms CuCO3 gray gas-like smell Started dissolving Starts looking slightly cloudy Becomes a little darker Blue formed some white color while release didnt Boiling, white precipitate increase Neutralize the solution and is a lot clear Cu (NO)3 blue Gas-like smell Started dissolving and boiling A luminousness blue is formed Becomes a little darker Blue-formed some redish color while red had no change Ultraviolent color is formed on the top of the solution A large substrate has been formed between the two colors. Violent on top and blue on bottom NaCl White none Started to fade out A tad cloudy Becomes a little darker No reaction No reaction No reaction 4. Attach your picture showing your rifle on step 4d. The picture should also show the results as appears in the experiment. pic pic pic pic 5. Result Write the results of your litmus paper test (2pts. ) The cooper formed a white precipitate. The CuCo3 blue formed some white color while red didnt.The Cu(NO)3 blue-formed some reddish color while red did not. NaCl had no reaction. ________________________________________________________________________ ____________________________________________________ 6. Questions root the questions briefly as shown in page 110 (3pts. ) A. Yes I did. I saw heat of combustion in about every chemical I test today. B. The evidence I saw was mainly copper. It had the highest reactivity out of any substance I used. C. Reactivity of any substance with cooper and heat combustion of substrates. D. Physical, physical, physical, and chemical E. physical, chemical, physical, physical , physical , chemical F. I would re heat the solution to give me a physical change.