The procedure is very short. First, I constructed the data table. I then massed one piece of Aluminum foil and record it in the data table. Next, pour 25.0 mL of 0.400 M Cu²+ solution and tear up the massed piece of foil. Drop the torn pieces in the solution and record the observations. Mass the other pieces of Aluminum foil, tear it up, and drop it in 25.0 mL of the 0.200 M Cu²+ solution. Record observations and clean up according to the teachers
Forensic Science Introduction: Someone in a restaurant has suddenly fallen ill and a mystery powder has been discovered with the victim. As the chief investigator, your duty is to identify the mystery substance through a lab. In this lab, it will consist of five known compounds and one unknown compound. Your job is to distinguish which one out of the five substances is the mystery powder. To figure out the mystery matter you will have to compare their physical and chemical properties and match them with the appropriate compound.
The experiment required our group to find out the mass and thickness of a single penny from a group of pennies, with each group of pennies’ being from different years. Tools such as calipers and eight scales were used to find the average mass and thickness of a single penny from each year. Our general hypotheses before conducting the experiment was that both the mass and the thickness of pennies would go down with each newer year of pennies.
The results of this experiment are shown in the compiled student data in Table 1 below.
4. Prepare the computer for data collection by opening the Experiment 3 folder from Physical Science with Computers.
In order to find a good set of results for this experiment I need to
Making nylon 6,6 is even easier if you use a diamine and a diacid chloride instead of a diacid. This is because acid chlorides are much more reactive than acids. The reaction is done in a two-phase system. The amine is dissolved in water, and the diacid chloride in an organic solvent. The two solutions are placed in the same beaker. Of course, the two solutions are immiscible, so there will be two phases in the beaker. At the interface of the two phases, the diacid chloride and diamine can meet each other, and will polymerize there. There is special way to do this called the "Nylon Rope Trick"4, and we'll show you how to do that in just a minuteMaking nylon 6,6 is even easier if you use a diamine and a diacid chloride instead of a diacid. This is because acid chlorides are much
The materials necessary for this experiment are: four plastic cups numbered 1-4, a scale, six ice cubes, cold deionized water, a pipet, a heat lamp, two LabQuests, four temperature sensors, some paper towels, and four partners in total. The first thing you will need to do is use the tare function to zero out the mass of cup #1, then add three ice cubes to the cup. Record the mass of the ice cubes. Once the mass is recorded, add cold deionized water to the cup until the total mass is between 99.80 g and 100.20 g. Use the pipet to add and subtract water as needed. Put cup #1 aside when this is accomplished. Repeat this process for cup #2. Continuing to cup #3, use the tare function to zero out the mass of the cup and then add between 99.80
The mixture was poured through a weight filter paper and Sucrose washed with a 5ml of dichloromethane. The resulting solid was left in a breaker to dry for one week, to be measured. Left it in the drawer to dry out for a week and weighted it to find the sucrose amount recovered amount.
he found the number of alpha particles emitted per second by a gram of radium.
Summary and procedures: the use of the different types of apparatus to get the correct results is always knowing it functionality and the correct significant digits. We always must make sure the balance should be 0.000 g when it is completely empty. In the case of the electric balance, the tray must to be clean and free of water or dirt, this machine is very accurate and precise. In the use of the flask and beaker, those should be cleaned before and after the use, that is how we avoid and create accidents for unknow chemicals or substances that were used before in the containers. Starting with the procedure, first is determine the mass for each balance in use, then record all the necessary data of that.
In this experiment we were studying about insulation and different types of energy flows. We mainly focused on learned about thermal energy and what direction thermal energy flows in. We were also learning about the R-value of our insulation. The type of insulation we tested for was air. The variable that we tested in our experiment was the temperature. I believe that the temperature was our variable because it kept changing in our experiment as we took more time to heat up the house. I predicted that the highest would reach mid 120 degrees as there is lots of heat building up that's enclosed inside the house. I also predicted that when it cooled down, the temperature would pretty much stay the same because the heat doesn't have too much way
The problems with this method start in the first step in the collection of data, we cannot observe
In addition, this investigation indicated that a flame test can be good way of distinguishing between different solutions, depending on the person performing the experiment. The colour changed to a crimson colour when the strontium nitrate solution was sprayed at the blue Bunsen burner flame. Similarly, all the other five solutions produced a colour when they were sprayed at the flame. However, each solution created a different and distinct colour and so the colours of the different elements were observed when placed in a Bunsen burner flame. Furthermore, this investigation indicated that a flame test can be good way of distinguishing between different solutions, depending on the person performing the experiment. Different atoms produce different colours and this effect can be used to distinguish between different elements. This is why a flame test can be used to tell the difference between certain solutions. However, almost everybody sees and describes colours differently. For instance, at first my partner and I both thought potassium nitrate and sodium nitrate produced the same colour, however, we were later able to see the difference. Therefore, a flame test can be good way of distinguishing between different solutions when the person who is experimenting sees the colours as distinctly
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
The lab we completed and the gold foil experiment are very similar in the ideas and ways that they worked. In the gold foil experiment the alpha-particle emitter would send a laser to bounce off a piece of gold foil which would cause some of the particles to be reflected and shown on the detecting screen. This is similar to the activity we completed because when we dropped the marble on the paper it acted as the laser, when the marble hit the carbon paper it was deflected onto the piece of circle paper underneath the carbon sheet. This activity and experiment contrasted because in the activity we completed there is not a similar size between the circles and the atoms. Atoms are the smallest unit of matter meaning that they are very hard to actually see, while in the