A group of 8th graders had to figure out what was in a Mystery Mixture, but they had no idea what it was. There were nine different substances that they had to work with. The substances were Epsom Salt, Chalk, Washing Soda, Road Salt, Table Salt, Citric Acid, Sugar, Vitamin C, and Baking Soda. The group believes the mystery mixture was Citric Acid & Baking Soda. To find out what the Mystery Mixture was the group of 8th graders had to use physical and chemical properties. First, the group decided to use physical properties. Physical properties are texture, smell, color, appearance, shape, and size. Citric acid & Baking soda was powdery with varying sized chunks, had a soft light white color, and had a very faint tangy smell. The Mystery
At this point the identity of the unknown compound was hypothesized to be calcium nitrate. In order to test this hypothesis, both the unknown compound and known compound were reacted with five different compounds and the results of those reactions were compared. It was important to compare the known and unknown compounds quantitatively as well to ensure that they were indeed the same compound. This was accomplished by reacting them both with a third compound which would produce an insoluble salt that could be filte...
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.
I did accomplish the purpose of the lab. First, I determined the percentage of water in alum hydrate, and the percentage of water in an unknown hydrate. The results are reasonable because they are close to the example results. Second, I calculated the water of crystallization of an unknown hydrate. Furthermore, I developed the laboratory skills for analyzing a hydrate.
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 Separation Challenge is an experiment involving the use of background knowledge of mixtures, properties of matter, and creativity in order to find a solution to separate three different substances layered on top of each other within a container. The experiment required a matter of coming up with a solid and thought out procedure to successfully separate the three substances individually within an amount of time using various lab materials and technology accessible at the time.
The purpose of this lab was to determine which type of pineapple will allow gelatin to form through chemical reactions. There were two pineapple types were fresh and canned, each having their own distinct effects on the Jell-O mixture. The hypothesis stated that if the tinned pineapple is added to the gelatin mixture the solution will turn into a solid (Jelly). This is because when the tinned pineapple is preheated to remove microorganism the bromelain enzymes are destroyed since they do not have the ability to withstand high temperatures such as 100 degrees Celsius. When the protease found in pineapple becomes impractical gelatin can be formed when hot water is added to collagen. Based on the results and observations, it can be confirmed that
The objective of this experiment will be to combine various substances, liquids and metals, and to observe their behavior when they are combined. The types of reactions observed shall determine the nature of these reactions: physical or chemical.
The mixture was poured through a weight filter paper and Sucrose washed with a 5ml of dichloromethane. The resulting solid was left in a breaker to dry for one week, to be measured. Left it in the drawer to dry out for a week and weighted it to find the sucrose amount recovered amount.
Primary qualities are those such as weight, shape, size, and motion. Secondary qualities are colors, tastes, sounds, smells. Frank Jackson explained that the very existence of the secondary qualities favors the idea of dualism. He states that science allows us to acknowledge and understand that there is no color in physical or material things. The color that we see is “sense-data” that is being collected. The very interpreted of things like color or smell shows that there are thoughts and ideas that cannot be defended by the material explanations that science can give
== = == 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.
2- Using the available data to predict the physical and chemical properties of various chemical compounds.
A piece of carpeting collected at the scene of a suspected arson is sent to the lab in an evidence collection can. Explain the methods that can be used to extract any volatile components that may be trapped in the carpet fibers?
1. The labels have fallen off of three bottles thought to contain hydrochloric acid, or sodium chloride solution, or sodium hydroxide solution. Describe a simple experiment which would allow you to determine which bottle contains which solution.
The formation of an odor is when chemical changes create a smell. For example when something rots it usually smells disgusting. Temperature change happen sometimes because chemical changes are normally accompanied by it. For example if you burn paper it will become much hotter. The formation of bubbles is another sign of chemical change, for example when you mix baking soda and vinegar it creates many bubbles. Finally formation of a solid may form, called precipitate. All in all chemical changes may have occurred if you observe some of these five factors.
In this lab the evidence contained ingredients B, D, and E. My team members and I came up to this conclusion because Nathan felt the evidence sample and he specifically said that it felt powdery and grainy like a crystal. With that, my table members immediately knew that it had to be Toner because when my team originally did the evidence sample we noticed it smelled sweet. Powder B smelled sweet and Toner was the only one with B but Tavaglione and Siy also contained B as well. My team and I knew that it could not be Tavaglione and Siy because none of them contained powder D. Powder D was the only powder to react to the Iodine test and the evidence sample was one to react with the Iodine test as well. Now my team and I knew that it coulden’t be Tavaglione or Siy. Powder E