Solution A The flame test produced a lighter orange flame indicating there was not a combustion reaction (shown in Table 2). The colour pink indicates that the cation Cobalt (Co2+) is present in a solution. Since the solution A was originally observed as a pink, transparent liquid, it was determined that the Cobalt was present in solution A. The litmus test results indicated that this solution is neutral (Table 2), therefore the anion found within the solution must abide by this. It was determined from the litmus results and Table 4 that the possible anions present in solution A were Cl-, NO3-, and SO42-. In order to determine the anion in the solution, Cl-, NO3-, and SO42- were compared. The anion Cl- produces precipitate with solutions C, E and F, while the NO3- and SO42- ion do not produce precipitate with all three. Therefore, the solution A must be CoCl2. Solution B …show more content…
Since Barium (Ba2+) is the only cation in this experiment which has this property, it was determined that the cation for this solution must be Ba2+. The solution was determined to be neutral, based on the litmus test results in Table 2. The anions which form a precipitate with Ba2+ were identified to be Cl-, NO3-, and SO42- using Table 4. Since precipitate was observed to be formed between solution B and solutions C,D, and F in the experiment, the possible anions were compared to determine which one followed these properties. Using the information in table 4, Cl- was declared the anion evident in solution B. Therefore, the solution B must be
The purpose of the Unknown White Compound Lab was to identify the unknown compound by performing several experiments. Conducting a solubility test, flame test, pH paper test, ion test, pH probe test, conductivity probe test, and synthesizing the compound will accurately identified the unknown compound. In order to narrow down the possible compounds, the solubility test was used to determine that the compound was soluble in water. Next, the flame test was used to compare the unknown compound to other known compounds such as potassium chloride, sodium chloride, and calcium carbonate. The flame test concluded that the cation in the unknown compound was potassium. Following, pH paper was used to determine the compound to be neutral and slightly
The Armenian genocide ruins Vahan Kenderian’s picture-perfect life. Vahan is the son of the richest Armenian in Turkey and before the war begins, he always has food in his belly and a roof over his head in the book Forgotten Fire by Adam Bagdasarian. Life is absolutely quintessential for Vahan, until the war starts in 1915, when he endures many deaths of his family, losses of his friends, and frightening experiences in a short amount of time. He is a prisoner of war early in the book and is starved for days. As he goes through life, he is very unlucky and experiences other deaths, not just the deaths of his family. Vahan ultimately becomes the man his family would want him to be.
Procedure: Anisole (0.35mL, 0.0378mol) was obtained and placed in a pre-weighed 25 mL round bottom flask, along with 2.5 mL of glacial acetic acid and a magnetic stir bar. Then the reaction apparatus was assembled, the dry tube was charged with conc. sodium bi sulfate, the 25 mL round bottom was attached to the apparatus, and 5 mL of Br2/HBr mixture was obtained and placed in the round bottom. The reaction took place for 20 minutes. An orange liquid was obtained and placed in a 125 mL Erlenmeyer flask along with 25 mL of water and 2.5 mL of conc. Sodium bisulfate soln. The solution was then placed in an ice bath to precipitate and then the solid product was filter in a Buchner funnel. These crystals were then re-dissolved minimum amount of hot solvent (heptane) and recrystallized. Once a dry product was obtained, a melting point was established (2,4-Dibromoanisol mp 55-58 C) and percent yield was established (52%).
Catching Fire: How Coooking Made us Human by Richard Wrangham is a fresh perspective on the evolution of humankind. Wrangham has made a concentrated effort to prove that humans have evolved particular adaptations, like bipedalism, due to the introduction of cooked foods into their diet. In his book, he is legitimately arguing that humans are the way they are because early on in human evolution, early man discovered fire, discovered the joys of cooked foods, and developed all sorts of fascinating traits still being utilized today.
Upon the arrival of Jeremy Crowder – SBI, Certified Fire Investigator, K9 Handler & K-9 Hampton a summary of the fire scene was given. A plan was developed for how and where we wanted K-9 Hampton to check for the possibility of accelerants being present. Handler Crowder and K-9 Hampton conducted 3 separate detection surveys of the area for accelerants.
Wanting to address the everyday consumer needs of safe cooking and electricity for those live in provincial societies, Bright Light Innovations of Colorado State University have developed a new product in which their management team of Business and Engineering students’ have considered as a definite solution through their revolutionary product—called the Starlight Stove. From identifying the everyday issues that people face in third world countries, the Bright Light Innovations team then identifies Nepal as their opening target market; in hopes that the Starlight Stove can improve the quality of life and well-being for those less fortunate. To benefit the lives of Nepalese, the Starlight Stove features the unique ability to convert heat from
In “Barn Burning” the setting is a time when people drove horse wagons and the workingmen were generally farmers. The major character in this story is Colonel Sartoris Snopes, called “Sarty” by his family who is a ten-year-old boy. In the beginning, Sarty is portrayed as a confused and frightened young boy. He is in despair over the burden of doing the right thing or sticking by his family, as his father states,” You got to learn to stick to your own blood or you ain’t going to have any blood to stick to you.”
For over 15 years, GMW Fire Protection has helped the residents of Anchorage, AK, to work and sleep with peace of mind. As a construction company offering installation services for fire alarms, pumps and sprinkler systems, as well as emergency and exit lighting, GMW specializes in prepping your property with the best in fire preparedness. Even if you've yet to invest in their top-quality products, their trusted staff offers this helpful list of fire safety tools you should always have in your home:
March 25th 1911 is the day one of the largest deadly workplace fires occurred. 146 factory workers died on this day as they fought to escape the Triangle Shirtwaist factory only to find locked exits, and faulty fire escapes. The public witnessed this display of poor fire safety and was quickly filled with sorrow. William Gunn Shepard claimed, “I remember their great strike of last year, in which these girls demanded more sanitary workrooms, and more safety precautions in the shops…. These dead bodies told the result.” This fire is often referred to as the tragedy that awakened the consciousness of America. The Triangle Fire showed the public the horrific working conditions that thousands of employees had at the time. The death of these 146
This is potentially why the Ba2+ ion would have been found in the Danieley River. The Harmony Restoration and Hardware Supply Company could be dumping their excess Ba2+ into the river. We determined that Ba2+ was in our sample because we added K2CrO4 to our sample and the CrO42- ion would have bonded with the Ba2+ ion to form a precipitate. A precipitate was formed and therefore we can believe that the Harmony Restoration and Hardware Supply Company may have something to do with the polluting of the
Solid A was identified to be sodium chloride, solid B was identified to be sucrose, and Solid C was identified to be corn starch. Within the Information Chart – Mystery White Solid Lab there are results that distinguishes itself from the other 4 experimental results within each test. Such as: the high conductivity and high melting point of sodium chloride, and the iodine reaction of corn starch. Solid A is an ionic compound due to its high melting point and high electrical conductivity (7), within the Information Chart – Mystery White Solid Lab there is only one ionic compound which is sodium chloride, with the test results of Solid A, it can be concluded that is a sodium chloride. Solid B was identified as sucrose due to its low electrical
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
London in the seventeenth century was a city filled with people, homes and buildings constructed of wood, and narrow roads. However, on the evening of September 2 this played a large part in a disastrous occurrence that would change London forever. In 1666 Thomas Farrinor, a baker, unsuccessfully extinguished his oven causing the Great fire of London to burn from September 2 to September 6, leaving thousands of London’s citizens homeless and churchless. On the dry summer night of September 2, 1666 in King Charles II’s home near the London Bridge, sparks from the bakers oven began to spread causing the nearby homes and buildings to burn. The Great Fire began in the bakery then spread to Stars Inn where it contained flammable equipment, which turned the fire into uncontrollable flames.
To a solution of (NH4)2Fe(SO4)2 • 6H2O (dissolved in 20ml water) 1 ml of sulphuric acid was added and stirred. The oxalic acid (dissolved in 25ml water) was also added and this combined solution was slowly heated to boiling, resulting in the formation of yellow iron(II) oxalate precipitate. The liquid was decanted and 15ml of hot water was added again to the precipitate, this was stirred and filtered. The precipitate (iron(II) oxalate) was transferred to another beaker and a potassium oxalate solution (dissolved in 10ml hot water) was added.
In the candle lab we saw a lot of things that happened. Before the candle was set on fire we made some observations about the candle. The candle was white and the wick was also white. At the time the candle didn’t have a smell. As we touched the candle before it was lit it felt smooth and the wick felt like a rope- like item. The wick hole was small. As we were observing the candle before it was lit the state of the candle was soild state. When the candle was lit we noticed that the flame was moving quite a bit. After burning for a period of time we started to see that there was a puddle of wax because the candle was melting . The wick’s color has changed now to black. The candle at the time smelled like charred wood and the flame wasn’t that