3 Question blog #2 (September 15, 2017)

Recently we have completed a " Chemical vs. Physical properties and changes lab". This lab consisted of 10 different experiments. The first experiment consisted of a bunsuen burner and matches, each person in the group took a turn lighting the Bunsen burner. The second experiment consisted of Alka seltzer tablets, a graduated cylinder, a stopwatch and water. At this station we put the tablets in the water and observed what happened as well as answered questions. The third experiment consisted of cobalt II chloride, sodium phosphate, a small test tube, and empty beaker and a waste beaker. With these materials we first placed the test tube in the small empty beaker, then we transferred five drops of cobalt II chloride solution into the test tube. Then we answered a few observational questions and following those questions we added 5 drops of sodium phosphate in the test tube. We then answered more questions and cleaned up our station. Next was experiment four, at this station was the dry ice, water, bubble solution a mug. This was the experiment we did together as a class.. Ms. Gardner showed us a video on the projector and together As a class we answered observational questions. Next was experiment five, at this station we had ammounium nitrate, tap water, ziplock bags, a graduated cylinder and a balance. We weighed out the five grams of ammounium nitrate directly into a ziplock plastic bag. Following that we answered questions and then used the graduated cylinder to measure out exactly 10 mL of water. We poured the water into the bag of ammounium nitrate, we mixed the solid water together answered questions and cleaned up the station. Experiment six consisted of a Bunsen burner, a ring stand, wire gauze, a 150 mL beaker, a thermometer, corn syrup, hot hands, and a stopwatch. We filled the beaker to the 50mL mark with corn syrup and placed the breaker on the wire gauze. Then using the thermometer we measured the initial temperature of the corn syrup in degrees Celsius. Then we recorded the initial temperature, then lit the Bunsen burner and adjusted it to a hot flame. We then heated the corn syrup until it reached a boiling point. Then we recorded the boiling point temperature, we then used the hot hands and removed the beaker from the ring stand, we then answered the questions and cleaned up our station. Next was station seven for this experiment we used a penny dated post 1982, a hydrochloric acid solution, a file, and a 50 mL beaker. We first labeled the beaker, then picked out the post 1982 penny and weighed it on the electronic balance and then took note on how the penny felt. Then we measured the mass, then using the file we made four deep scores evenly distributed around the edge of the penny, then we added approximately 25mL of HCI to the 50mL beaker. We gently dropped the penny and observed the reaction for two minutes. We let it sit there and at the end of the lab came back and poured the HCI out of the beaker, but not the penny. We then added water to the beaker and rinsed the penny a couple of times, dried it off and weighed the pennies electronic balance. We then answered questions and cleaned our station. Following experiment seven was experiment eight, we had a Bunsen burner, a strip of magnesium ribbon and rings at this station. We lit the Bunsen burner and brought the flame to a hot flame. We placed the enottt beaker next to the Bunsen burner, used the tongs we held the magnesium ribbion by one end and put the other end of the ribbon in the hottest part of the flame. When the ribbon ignited we quickly removed it out of the flame and over the beaker to catch anything that dropped. Using the correct procedures, we turned off the Bunsen burner then observed what happened without directly looking at it. We then answered questions and cleaned up our station. Then was experiment number nine at this station we had a beaker of sandy water, a 50 mL beaker, water, a funnel, filter paper and an empty beaker. We used the materials to mix the sandy water and poured it through the filter paper and funnel into a beaker. We answered questions following the experiment and cleaned up. Last but not least was experiment number ten, for this experiment we used a Bunsen burner, a ring stand, iron ring, an evaporating dish, tongs, a beaker, a graduated cylinder, sodium chloride, water and insulated gloves. We mixed the materials together and had to classify the salt water solution. Then we transferred the salt water solution to the evaporating dish, then used the gloves to move it to the iron ring. Then we lit the Bunsen burner and heated the salt water solution until there was no more water left in the evaporating dish. We then answered questions and cleaned up our section. After completing all of these tasks I would say that I have learned that each station had different reactions and results with the different mixtures and procedures that we completed. The one thing they all had in common was that the data and information was based off of our observations. To improve my understanding for the next lab I would definitely be more careful and work more efficient because I did feel as if our group was cramming towards the end because we spent too much time trying to read all the procedures before doing them instead of going step by step. Overall it was a very good lad and I learned a lot! I would definitely say this lab was very informational and the questions following each experiment tested our knowledge on knowing what we learned in the notes.