Conclusion:
Which elements burned the longest? The elements that burned the longest were, Calcium Chloride, Copper II Chloride, and Barium Chloride.
Lithium, Sodium, and Potassium are located in the same family on the periodic table. What family is it? Where there any similarities/differences in their flames? Explain. Lithium, Sodium, and Potassium are in the alkali metal family. Lithium and potassium both had medium height flames, where social had a tall flame. All three were different colors, lithium red, sodium orange, and potassium purple.
Calcium, Strontium, and Barium are located in the same family on the periodic table. What family is it? Where there any similarities/differences in their flames? Explain. Calcium, Strontium, and
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Barium are in the alkaline earth metal family. Strontium and barium both had short flame heights, where calcium had a tall flame. Barium and calcium had orange flame colors and strontium had a firetruck red flame color. What could have happened if you did not clean the wire before each test?
If you did not clean the wire before each test the compound you just tested on might not have burned all the way off, which means there could still be some of that compound on the wire. When you start a new test you would end up mixing the compounds. That would give off a different color and result in an inaccurate test.
If a firework is mostly a green/blue color, what element do you think is in the firework? If a firework is mostly a green/blue color I would belive copper would be one of the elements that make it up. I would guess copper because when copper is burned it gives off a blueish color light.
In a paragraph, summarize the lab. During this lab we observed what happens when certain compounds are exposed to flame. We used bunsen burners to use for the flame. We used a nichrome wire to hold the sample of the compound when we burned it. As the compound was put into flame it burned and gave off a specific color of light. We did this to all our of known substances and recorded detailed observations about the color, flame height, and intensity. All compounds when introduced into a flame gave off different colors, due to their chemical make up. I feel my group did a good job at taking descriptive notes, which aided immensely in the determination of the unknown compounds. An error that might have occurred without any of us noticing could have been that we held different compounds to close to the flame
and others to high up. Which would have meant some compounds received more energy than others which could possibly affect our results.
The primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
Conclusion: In support of my hypothesis, it is found that the mystery powder is one of the five known compounds. Through experimenting the chemical reaction in spot plates, it is concluded that the mystery powder is icing sugar. It was fairly straightforward because we just have to see which substances matched the reaction of the mystery powder. All in all, my hypothesis is correct and through researching the interpretation, icing sugar is the mystery substance.
The technique used to narrow down the identity of unknown white compound were solubility test, pH test, flame test, and ion test. The first technique used to narrowed the properties of unknown white compound was using solubility test. To conduct solubility test, 0.25 gram of unknown white compound was dissolved in 100 mL of water. After carefully observing the change while string unknown white compound in water, the unknown white compound was soluble because it dissolved in water completely. Using bursen burner, matches and deionized water, flame test was conducted for unknown compound and it burned lilac color. Then compared the color of unknown white compound to other compound that were narrowed. The results of flame test for compounds that were narrowed down is shown in the following table. The pH test was conducted using litmus paper. 0.50 gram of unknown white compound was measured and dissolved in 10 mL of water in beaker. After dissolving, placed the litmus paper in solution and recorded the pH value of unknown compound which was neutral. Then compared the pH value of unknown white compound to compound that were narrow down. The pH result of the KCL, KNO3, NaCl, and K2SO4 is presented in the following table. The ion test was also conducted in order to make sure that the identity of unknown white compound was matched with the compound that were narrow down. After conducting the test, the result of unknown white compound which formed precipitate compared to KCl, KNO3,NaCl, and K2SO4. The results shown in the following
We gauged the amount of mass that the fuel lost when raising the temperature of water 20 degrees C. Throughout the experiment we constantly worked with chemicals, boiling water, and liters, turning the Bunsen burners on and off. Because of this, each member of our group were carefully to wear goggles, gloves, a lab coat, and closed toed shoes, with pants down to the ankles. We also cautiously recalled the safety quiz with the locations for the shower and eye flusher in order to make sure we were prepared in case we required their use. Learning to remember these skills grew our knowledge and helped us be cautious for labs to come when working with dangerous
The first thing in a firework is the oxidizing agent. These produce the Oxygen to burn the mixture. Oxidizers are usually nitrates, chlorates or perchlorates. The common oxidizers are nitrates. These are made up of a metal ion and the nitrate ion. I'll use potassium nitrate as an example. Nitrates only give up 1/3 of their oxygen. The resulting equation would look something like this:
To produce a powder or solid that when lit will produce a colored fire the steps are a lot more complicated. To get a powder to burn alone both a fuel and oxidizer are needed. The most common oxidizers are Ammonium per chlorate, sodium nitrate, guanine nitrate, potassium chlorate, ammonium nitrate, potassium chlorate, potassium per chlorate, and strontium nitrate. Many of these oxidizers produce a colored flame by themselves. Some of them are severely toxic and environmentally
Lithium has an atomic number of 3, and an atomic weight of 6.94. In general, lithium is more stable than hydrogen, and slightly less stable than nitrogen, carbon, and oxygen. When looking at chemical ion properties, it is useful to consider three main characteristics: the size, or radius, of the ion, the charge, and the ion's electron affinity. Lithium has a similar charge to radius ratio to that of magnesium, which is in group IIA of the periodic table, and so chemists say that the two elements are "chemically similar.
...for the original titration, shown in Table 5. This could be due to perhaps usage of the wrong indicator, or of not stopping the titration exactly when the color changed.
Writing in Biology is different than writing in other courses like English. In Biology, the writer must conduct an experiment prior to writing a lab report on the findings. For this lab report, I had to conduct an experiment comparing the cellular respiration rates of germinating peas and non-germinating peas. Before beginning the experiment, we had to create a thesis that would state which set of peas would have the higher respiration rate, germinated or non-germinated peas. We were expected to make a thesis based on our prior knowledge of how cellular respiration works in plants. I conducted the experiment during class two weeks before the lab report was due. The experiment consisted of placing peas in a Biochamber where the levels of carbon dioxide and oxygen would be measured every 6 seconds for 3 minutes. After completing that, my instructor stressed that we repeat the experiment 5 more times for each set of peas. After collecting the data, we compare...
Potassium is a solid silvery white element. It is soft and can be cut with a knife. Potassium is the least dense known metal, besides lithium. It is the seventh most abundant element. It makes up about 1.5% by weight of the earth's crust. It decomposes in water because of the hydrogen. It usually catches fire during reaction with water.
The Periodic Table is based around the Atomic Theory. Firstly people believed that everything was made up the four elements Earth, Fire, Wind, and Water. This theory evolved into everything being made up of atoms. Breakthroughs throughout history such as the discoveries of the nucleus, protons, neutrons and electrons have pushed this theory forward to where it is today.
Whilst recording the result we removed the pencil to prevent it from overheating, and therefore affecting the results. When taking the second reading, we turned the pencil around to see if that would make any difference. Again, whilst recording the
It may astonish the reader to discover that modern man harnesses a prehistoric technology to power machines, produce electricity, and as a simple means of creating fire. Fire is one of man’s oldest and most useful tools. Without fire early humans could not cook, harden wooden weapons, smelt metal, or warm themselves in colder climates. The discovery of a means for producing it assisted early man in assuming the role of apex predator. Therefore, fire allowed humans to thrive in environments where survival would have otherwise been impossible; it likewise allowed them to exert control over their environment in ways other creatures haven’t duplicated.
It is mandatory that all the lab users need to work under the supervision of the instructor or any other qualified personnel. When conducting experiments, the users need to proceed with caution and report any spills, injuries and accidents to the teacher or the person in charge. The students should be careful when handling the lab chemicals and equipment to avoid accidents (Jay, 2010). When heating substances caution should be taken not to point the test tube to yourself or a colleague. All open flames that are in use within the lab should not be unattended and always turn off all the heating equipment and water taps when not in use. All the students should ensure that no experiment should be left while in progress at all
Wildfires are catastrophic disasters that destroy everything in their path. “A wildfire (also known as forest fire, grass fire, vegetation fire, etc) is an uncontrolled fire often occurring in wild land areas, but which can also consume houses or agricultural resources.” (Wildfire.) The causes of wildfires are mostly intentional, negligence or accidents and natural causes. Wildfires have three distinct phases: Initiation, propagation, and extinction. This phenomenon affects our ecosystem, such as air and earth. In addition, people who witness this kind of catastrophe in the lower cases they lose belongings as houses or cars, but they can also lose their lives. There are many campaigns that help prevent these phenomena, but they need the help of the entire community. It is very important take care of not cause an accident. Wildfire is a phenomenon very common on these days causing a terrible damage to our environment and we have to prevent its expansion through our help, cooperation and prudence...