Chemical and Physical Changes Lab Report

Also, be cautious as to not inhale the chemicals. Because the glassw are is glass, they may prisonbreak and as such must be handled gently. All glassware should be inspected for cracks before starting the lab. Ill. Pre-Lab Questions- 1 . Identify the following as either chemical or physical miscellaneas A. Striking a match- Chemical B. nutriment Spoiling- Chemical C. Breaking a Glass- Physical D. Mowing the Grass- Physical E. Leaves Decaying- Chemical F. stewing Water- Physical 2.In your own words, state the uprightness of Conservation of Mass The Law of the Conservation of Matter says the matter evict be neither created nor destroyed. 3. discover he indicators of a chemical change Chemical change can be illustrated in m whatever forms such as rust, decay, light creation produced, heat be given off or frigidness being given off, and color change. These are simply a few and are not whole of them. 4. Identify each as an element, compound, or change A. Alarm- Compound B. S ulfur- Element C. Hydrogen Gas- Element D. Salad- Mixture E.Water- Compound F. atomic number 11 Bicarbonate- Compound G. Fruit Punch- Compound H. Sodium Chloride (table salt)- Compound V. Procedure- essayation 1- intensify a few cast-iron filings along with sulfur powder on an unused piece of paper. Mix the samples well with a scoopful. Examine the variety show with a magnifying glass and record your observation. Next, move the attractor under the compartmentalization and reexamine It with a magnifying glass once again and record the observations. lock the sample. Experiment 2- Fill a infinitesimal beaker half way with cold pissing.Obtain a test tube with warm bath water and amplify the warm bath water with the cold water in the water and placing it in the trash can and dump the water land the sink. Experiment 3- Place a piece of magnesium in a clean, ironic test tube. Next, add 10 drops of MM HCI. temper observations. Carefully pinpoint the bottom of the test tube t o check for the change in temperatures. crocked contents down the sink with plenty of water. Experiment 4- Transfer small amounts of atomic number 11 bicarbonate into a clean, dry test tube.Add 10 drops of MM HCI individually. Touch the bottom of the test tube and record all observations. tone down all the leftovers down the sink. Experiment 5- Mix 10 drops of barium chloride dissolving agent in a test tube with sodium sulfate solution. Record all observations in the data table and then pour down the sink. Experiment 6- Mix a small scoop of sodium chloride with 2 ml of water in a test tube. Record all observations and wash down the sink. V. Data and Observations- Experiment Mass and Observations Chemical or Physical?When the magnet was held under the piece of paper, the iron stood up and followed the magnet physical 2 The warm water became a unassailable when added to the cold water physical 3 When the MM HCI was added, the liquids began to bubble and heat up, which is exothe rmal chemical 4 When the MM HCI was added, the liquids began to bubble once again and the liquids lolled, which was endoergic chemical 5 When the barium chloride was added, the color changed and the consistency changed to a much milky consistency physical 6 When the small scoop of sodium chloride was added to the water, nothing could be go alongd as happening physical VI.Calculations- VI. ship Lab Questions- 1. In which lab did you name a precipitate? A precipitate was observed in taste number 2. 2. In which did you observe postal code change? An energy change was observed in experimentation number 1 when potential energy changed to mechanical energy. . In which did you observe a color change? A color was observed in experiment was observed in experiment number 5 when it became a milky color. 4. In which did you observe the formation of a gas? Gases of any sort. VIII.Conclusion- The purpose of this lab was to identify what a chemical change and what a physical change is. A c hemical change is when bonds are scummy and new ones are forced to form. Some indicators are a change are exothermic (heats up), endothermic (cools of, precipitate (solid forms), and color change. In the rootage experiment when the agent was under the sheet of paper with the iron filings, the iron filings stood up on their end and followed the magnet around, changing from potential energy into mechanical energy.In the second experiment performed, a precipitate formed, a solid was formed out of the warm water when it was added to the cold water. In experiment three, an exothermic change occurred when the magnesium and MM HCI where combine, resulting in bubbling of the cardinal and then the test tube heating up. Then in experiment four, an endothermic change occurred when the sodium carbonate and MM HCI were combined in the test tube and the test tube cooled down.In experiment five, there was a color change when the barium chlorine and sodium sulfate were combined resulting in a n ew milky color which also directly had a milky consistency. In the sixth experiment, as far as I could tell, nothing happened in the sixth experiment. X. Error Analysis- The only attainable phantasm I can see is if my group made an error of some sort of error in experiment number 6 when nothing happened, and it Just seems like something should have happened in the experiment.