Lithium-ion battery

Free radicals are molecules that have at least one unpaired electron. They are typically very reactive, due to their odd number of electrons. These molecules tend to try and gain or lose electrons so their highest energy levels can be filled. They will bond with other compounds in the body, sometimes combining with them, or even taking parts of intact molecules, resulting in even more free radicals (Walling). Free radicals can be formed by natural body processes, such as metabolism. They…

Covalent bonding occurs when atoms share pairs of electrons. Atoms will covalently bond with other atoms in order to gain more stability, which are gained by forming a full electron shell. By sharing their outer most valence electrons, atoms can fill up their outer electron shell and gain stability (Chem wiki) Nonmetals will readily form covalent bonds with other nonmetals in order to obtain stability, and can form anywhere between one to three covalent bonds with other nonmetals depending on…

Chemistry, oh chemistry! Chemistry is an interstmig subject. Withourt it we would not know many of the thigns we do today. However, with chemistry comes a lot of studying and hard work. There are three bonds in chemistry ionic, covalent, and hydrogen. Do not ask me why they named them this because I am unble to tell you this. However I can tell you that SCl2 is an ionic bond and NaCl is a covalent bond. Well, that is that the atoms in them form those types of bonds. Hard to belive I know, but…

completion of CEM 161 Section 009, under supervision of Abstract: In order to determine the identity of the compound we performed many experiments with a solution of the compound. These experiments included testing for all of the following ions; ammonium, halide, sulfate, carbonate, nitrate, and acetate. After comparing the results of these experiments we determined that our compound contained a halide. By using the flame test with a Bunsen Burner we also determined that our compound…

Afra Ankita Class 625 EV3 Test 3 The threshold for white was any intensity above 95%. The threshold for black was any intensity below 6%. This is because the first white surface that was tested for its reflected light intensity turned out to be 95%. The second test for white was 100%, the third was 97%. All these tests were made by using “Port View” on the robot.“Port View” can be found by going to “Utilities” on the robot’s screen. Then going over to the port that the color sensor is connected…

In this study, we developed an anthracene-based fluorescence PET sensor (AMG) was developed for detecting high pH values and water content in organic solvents. A guanidine group as a proton receptor was covalently attached to an anthracene fluorophore to afford highly polar AMG, with reasonable solubility in highly basic solution. The fluorescence of AMG increased almost linearly with decreasing pH in the range 11.0–13.0. AMG also exhibited a fluorescence turn-on response to water in various…

Identifying Unknown Substance. Examining the physical characteristics of the available compounds in the lab was how possible compounds were eliminated from any or further testing. Based on how the compounds physically looked, it was almost for certain that calcium chloride was the unknown compound. However, another compound was used to test as well (ammonium chloride) since relying only on physical characteristics alone would not allow for proper experimentation. The unknown ended up being…

strip. The solution had a pH>7. Then we did an anion test and discovered the compound reacted with chloride by producing a white precipitate. The precipitate that formed was an insoluble solid because Cl of NaCl reacted with Ag of AgNO3, creating a Cl- ion above the aqueous solution [3], results on Table 2. Finally we used a cation flame test, results on Table 4. When we burned the unknown substance the flame was a bright orange, yellow color. This was because the flame reacted with the Cl of…

To start off with this experiment, we drew dot structures for each compound and decided whether the compound was polar, nonpolar, or ionic. We found that KCl and CaCl*2H2O were ionic compounds, so we used the electrical conductivity tester to insure us that they indeed conducted electricity. After testing these two compounds, we decided that KCl was the solution labeled “Wolves” and CaCl*2H2O was the solution labeled “Swarm”. We decided this because we knew that the CaCl*2H2O compound was a…

Task 1 and 2 First ionisation energy – The first ionisation energy is the energy required to remove the most loosely held electron from one mole of gaseous atoms to produce one mole of gaseous ions each with a charge of +1. The first ionisation decreases as you go down a group. This is because the electrons are getting further away from the nucleus meaning it is easier to remove the outer electron. There is also less shielding thus allowing the outer electron to be removed much more easily. As…