Scientific report on cations and anions
How can we work out the unknown solutions by completing a flame test and a precipitate test?
In this experiment we will work out two different unknown solutions using a flame test and a precipitate test. A flame test is a procedure you use in chemistry, predominantly with a Bunsen burner, to detect certain elements, based on their emission of colour that they give off. The colour of the flame will depend on what substance (or solution) you are using during the experiment. It is different with a precipitate test because a precipitate test, usually involving test tubes, will determine which chemical (or solution) it is by the way it reacts mostly turning the solution cloudy or an assorted colour, for the
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Step 5: Observe colour change determining on what kind of unknown solution is being used
Step 6: When you are finished with experiment pour your solutions into the waste bin
Step 7: Always remember after every experiment wash your hands (especially when working with dangerous or harmful chemicals)
Silver nitrate
Unknown solutions Observations
Unknown chemical A Halide goes a strong cloudy white
Unknown chemical B Sulphate stays a transparent blue
Barium Chloride
2 unknown Chemical solutions Observations
Unknown chemical A Halide no change stayed
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When doing the precipitate test of the experiment to figure out anions we have written down qualitative observations, we have also hypothesised that if we cover unknown anion A in Silver Nitrate then it will turn a strong cloudy white because unknown anion A is Potassium Iodide and if we were to cover unknown anion B in Barium chloride then it will go from a transparent aqua/blue to a cloudy light blue because unknown anion B is Copper Sulphate. It is rational to say that we believe the 2 unknown cations are Sodium and Copper while the anions are Iodide and
The purpose of conducting experiment was to determine the identity of white compound. Based on the 5 gram of unknown white compound several experiment conducted including solubility test, pH test, flame test, and ion test. Several materials including chemicals used throughout experiment and will be described through paragraphs.
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.
This smoke bomb lab helped me understand chemical bonding and reactions by starting from the very beginning with mixing the nitrate, sugar, and melted crayon. Mixing them formed a texture almost like powdery peanut butter with some liquid which was actually pretty interesting. The second chemical bonding I seen was that, once putting the solution in the tin-can and it started solidifying due to all the stuff we mixed together. It didn’t take long at all for it to start forming into a solid. When we went outside and lit the wick on fire showed the main chemical reaction throughout the whole experiment. The nitrate reacting with the lighted wick started a big fire in one of the groups cans but some of the other groups bombs didn’t get to light like it was supposed to and the wick just burned out. I was one of the groups whose bombs didn’t work properly. I think it’s because we didn’t put the wick in deep enough to our solution so when we lit it the fire just burned out before going into the solution.
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.
This can be done by first finding the products of the chemical reactions, which are found by swapping the anions on each reactant. Once this is done, predictions can be made. The table above, describes the solubility rules, these are used to decide whether a compound will be soluble, and then consequently to this reveal a precipitate. Barium sulfate for example is insoluble and if it was to be mixed with an aqueous compound, barium sulfate would be the precipitate. This is an example of how a prediction can be made, without physically viewing the experiment or given the results. It is also a way of identifying what the precipitate is once the experiment has been
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.”
A book that fully illustrates the hardships of dealing with the reconstruction of a nation after an era of slavery as well as concisely providing insight to a strong civil rights voice is “The Fire Next Time” by James Baldwin. His writing is a both an examination of race relations in a segregated America, and an impassioned plea for both whites and blacks to abandon the hate and embrace love as an outlet for their differences. The title of the book comes from an negro spiritual quotation that Baldwin directly relates to the inevitable consequences of continuing racial injustice: "God gave Noah the rainbow sign, No more water, the fire next time!"
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
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
So the thing about the prescribed burning is that they are highly feared amongst the general population. The fear is that prescribed fires can tear out of control. People really fear fire can you blame them?. Fire is unpredictable and most definitely has a mind of its own. Its something that should be handled with caution but never feared.
Burns can be classified by mechanism of injury and depth of burn in relation to layers of the skin. Common mechanisms are: thermal, electrical, chemical, radiation and nonaccidental.
What might happen if I were to try to mix water, oil, food coloring and Alka seltzer. I had the hypothesis that if I mix all these things that it would make bubbles of gas. So I tried it. Using the materials provided in class, I found that water and oil don’t mix at all. The oil ended up on top of the water. Meanwhile the food coloring and water almost effortlessly mixed at first contact. After recording the mass of the alka seltzer, I dropped it right it into the test tube. As it crossed into the border of where the water met the oil, it reacted with the water to make the water bubble into the oil. As I started adding more and more Alka-seltzer, I observed that the bubbles went up and then down as it met the surface of the oil then to re-settle into its separate mixtures of water and oil. The reaction caused by
== = == Hypothesis for the experiment: After I conduct this experiment, I expect and suppose I can recognize and physical changes, identifying the difference these two kinds of changes. Also, I will be able to know some physical and chemical properties of copper (II) sulfate, water, iron, sodium carbonate, hydrochloric acid and magnesium and identify if it is a chemical change or physical change in each part of the experiment.
“With great power comes great responsibility”. This was said by someone who had a profound way with words, but I'm not sure exactly who it was, mainly because it has been said in every known origin story of a superhero I can think of, so I guess it's safe to say it is motivational. Imagine that you could have one super power. What would it be and how would you use it? What would be your kryptonite? In all honesty I can say I have thought about this particular question too much in my 17 years of being alive, but maybe that's just because I am a huge Marvel fan. Being the comic book nerd that I am I can honestly say Stan Lee is a genius and sometimes I love him for his writing and sometimes I hate him for it. If I were to have one superpower
This is The Fire Triangle- there are four elements that make a fire. There must be oxygen to sustain combustion, heat to raise the material to its ignition temperature, fuel to support the combustion, and a chemical reaction between the other three elements. If any one of those four elements are removed, the fire is extinguished. To extinguish a fire, fire extinguishers have been made.