Law of Conservation of Mass Experiment CER Question: Does a controlled (closed system) zip lock bag experiment demonstrate the Law of Conservation of Mass? Claim In our class we did an experiment where we put different known supstances into a ziplock bag and closed the bag, that way we could achieve a closed experiment and attemp to support The Law of Conservation of Mass. The Law of Conservation of Mass states that mass can neither be created nor destroyed in a closed system. According to my data in the ziplock bag experiment, it supported the Law of Conservation of Mass because before the experiment our total of all the substances added to 32.3g before and after the experiment. Evidence Name Mass (g) Before Mass (g) After Mass (g) Difference …show more content…
Where as the other 50% of the groups did not support the Law of Conservation of Mass. The data that my group collected supported the Law of Conservation of Mass, as our substances stayed the same weight before and after in the closed experiment. Out of the 4 groups on my table 4 out of 4 or 100% of the groups supported The Law of Conservation of Mass. On the graph, you can tell that there was a chemical reaction that took place because there was an exothermic reaction. The temperature started rising right away, which is when the reaction started to take place. The beginning temperature of the substances used was between 21∘C and 22∘C. By 90 seconds into the experiment the temperature was at 72∘C. Immediately after 90 seconds the experiment had ended because then the temperature of the mixed substance was decreasing to go back to room temperature where it started. The final temperature that my group took was 33∘C at 8 minutes and 12 seconds. …show more content…
In this experiment my group “supported” The Law of Conservation of Mass because, in our closed system experiment the mass didn't change. For this experiment we had to calculate the mass of all of the materials that we used along with the bag before the experiment occurred. After the experiment the groups had to take find the mass of the bag and the substances. During this experiment you had to have the ziplock bag closed to make sure that none of the substances, if turned into gases, would be contained in the bag. For that reason the mass should stay the same as stated in the Law of Conservation of Mass. We had to mix baking soda, calcium chloride and water and then as a product we would have rocksalt and calcium carbonate, 2NaHCO₃+CaCl₂===>CaCO₃+CO₂+2NaCl+H₂O. We know that a chemical reaction took place because on the products into reactants equation the elements are equally transfered from one side to the other after the chemical reaction took place. We were given a plastic bag, that way we could do a closed experiment. We had to support that there were endothermic and exothermic reaction and that The Law of Conservation of Mass was present in this
The temperature probe was then quickly cooled to room temperature. When this was achieved, the hot water was immediately transferred into the calorimeter. This method of keeping the temperature probe cooled before measuring a new temperature was repeated throughout the entire experiment. Temperature data was collected for 180 s while swirling the temperature inside the calorimeter. The calorimeter still contained the warm water.
Conclusion: Compare Trial 1 and Trial 2. The Trial 1 change in mass are 12.5g, however Trial 2 changes in mass is 1.2g. The Trial 1 change in mass is more than Trial 2. And I think the Low of Conservation of Mass violated in the Trial 1 is can be exist. Because the Trial 1 actually the soda with vinegar have Chemical reactions occur and chemical
The hypothesis made, the density calculated in the experiment will stay the same because the density of the unidentified object will never change, was supported. The results support the hypothesis because in every trial the density always came out to 9g/mL. In trial one the mass was 71.16g, the volume was 8mL, and the density was 8.895g/mL, but when rounded to the proper sig fig came out to 9g/mL. In trial two the mass was 71.12g, the volume was 8mL, and the density was 8.89g/mL, but when rounded to the proper sig fig came out to 9g/mL. In trial three the mass was 71.14g, the volume was 8mL, and the density was 8.8925g/mL, but when rounded to the proper sig fig came out to 9g/mL. When averaged the mass was 71.14g, the volume was 8mL, and the density was 9g/mL. Errors that could have occurred are, not calculating the density correctly, not completely submerging the unidentified object with water in the graduated cylinder to get the volume, not rounding the sig figs correctly when finding the density, not measuring the unidentified object’s mass in grams, not measuring the unidentified object’s volume in milliliters, and not writing the correct units with the proper number or not the correct unit at all.
Repeat steps 1-10 for two more trials. Conclusion: 1. I chose to compare temperature and amount of reactants in my experiments. I chose these because I thought they would reveal the the most drastic time differences. I also chose these factors because I had prior knowledge of them before I even started chemistry.
In the experiment “Losing Your Marbles” we learned about momentum and conservation. We learned by dropping a marble down a ramp and timing how long it took it to get to a certain distance. Momentum means the mass, in grams, multiplied by the velocity, in cm/s. Or P= m x v. Conservation means something "stays the same." In this case it means that the momentum after a collision between marbles is the same as the momentum before the collision.
To calculate the experimental mass the substance of each bag and the bag its self was measured using a balance. After gathering the mass subtract the mass of the empty bag to the mass of the unknown substance, in order to just have the mass of the substance. Afterward the mass of the unknown substance was divided by the number of moles recorded on the bag of the substance. The measurements are displayed on the table
The volume stayed consistent because to decrease, the process needs activation energy. Once the activation energy was stored, the compost started to decrease almost linearly. The decreasing was due to worms eating the compost and disposing some of it as dirt, disposing some into the air (CO2), and using other part of the compost like the H’s as energy. This was due to cellular respiration; the worms used the compost for glucose, and due to homeostasis unused molecules were released through respiration.. The compost stayed constant again at the end of the experiment because worms started to die, and weren’t able reduce any more
The gummy bear's mass and volume will increase while the density of the gummy bear would decrease after it is put into water overnight. (#)This lab experimented to figure out wah changes would take to the gummy bear’s mass, volume, and density after sitting in a cup of water overnight. To do this the gummy bear's dimensions and weight was taken on the first day, along with its density and then the gummy bear was placed and water. When the gummy bear was taken out of the water on day two, the dimensions, weight, and density were taken again, and the difference between the two days was found. (#1)
How does the amount of baking soda mixed with vinegar affect the volume of gas produced per 10 seconds? A reaction is when (usually) a solute acts on a solvent to create a reaction. An example of a reaction is an explosion, Here we will be using baking soda and vinegar which are our two components which will cause for a reaction to take place. Reactions can be affected by several things such as temperature, concentration and the presence or absence of a catalyst which is a substance which can increase the rate of reaction.
The other time where mass could have been lost was during reaction 3, more specifically each time the liquid was decanted. Although a few black sand-coffee grains of the copper (II) oxide lost do not seem like a significant amount, they do have an impact on the final result, and each time a few of the grains were accidentally decanted could have an impact on why our final recovered mass was less than the initial amount that we began
In this lab we used two processes called Diffusion and Osmosis. Diffusion is the movement of molecules from areas of high concentration to areas of low concentration. Diffusion is a process that requires no energy and involves smaller non-polar molecules. In Figure 1 you can see the molecules spreading throughout the glass from the area of high concentration, so that the areas with low concentration are filled evenly as well. The other process was osmosis.
Title: THE BALLOON INFLATION REACTION Introduction: Chemistry is one thing that makes us understand and gives us reasons of why certain reactions gives certain results. In this experiment we will be illustrating the reaction between baking powder and vinegar and see what happens to the balloon that is attached to it. Hypothetically the reaction of the vinegar and baking powder will produce carbon dioxide which will inflate the balloon. If the more vinegar may happen that when more vinegar is added to the baking powder it may produce more carbon dioxide thus the balloons diameter increases.
For the efficacy of this argument, I will ask you grant my assumption that is: Mass cannot be created or destroyed. However, it can be rearranged or changed in form through processes like chemical reactions. All the matter that composes the universe has always been there and will never cease to be there since it cannot be
Scientific theories can almost never be proven, and if they are proven they become scientific laws. One being the law of conservation of energy. As opposed to a theory, a scientific laws are typically accepted without any exception, yet some that pose a conflict with the laws have helped modify them over the years to make them more accurate. 1. guide through e-portfolio.
Additionally, we had to conclude how mass plays a role in the amount of force the object has upon hitting the ground. Going into this experiment, our group already had a large amount of background knowledge, due to the many Log Questions regarding