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Observing chemical reactions lab
Observations of chemical reactions lab
Observing chemical reactions lab
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Introduction: What if one day in class your teacher handed you a vial with some kind of mixture in it and said: “Find out what's in it”? Well the 8th grade class at NFVMS were asked to do this. They first started out stating the physical properties like color, texture, size, and appearance. Using this method, the 8th graders came up with a couple different claims that had 2 or more substances in them. To find out what was truly in the mysterious vial they decided to test the chemical properties of their own mixtures to see if they would react the same way as the mystery mixture. They found the chemical properties by adding water to their mixtures and looking for things like change of color, the amount of gas released, and the temperature. …show more content…
Most of the class thought that the mystery mixture was Baking Soda and Citric Acid because of all the data they collected. To find out the physical properties they added chemicals they thought could be in the mixture and looked for similar attributes. Some specific things they looked for were the size of the chemicals, the color, and texture. The size of citric acid was about the same as grains of sand, the color was white and, it had a very sticky texture. The Baking soda stuck to the pieces of citric acid some physical properties on baking soda are, the texture is very powdery, the appearance looks like snow and, it is very small. When it came time to test the chemical properties the class looked for things like temperature, color change, and gas released. The class left a well tray with four different combinations including the mystery mixture. The next day they looked at the chemicals and the mystery mixture and the baking soda citric acid were the same color.The baking soda and citric acid along with the mystery mixture were a clear color. The class did a big group experiment to find that the temperature of baking soda and citric acid was 16.7ºC. As they looked at the gas being released they noticed that it kind of left a fog and when you stirred it slowly went
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
A lot of things went well in this experiment. This experiment had the same amount of pennies, chemicals, and bowls to put the chemicals in and the pennies. Another thing that went well was that all the pennies got the same amount of time in each chemical. In this experiment no problems occurred. Some experiments that were thought of doing this this experiment was; What would happen
The lab experiment did prove that Crayola colors are not of pure substances but rather a mixture of specific color compounds needed to produce said colors. The experiment also proved that different color pigments have different densities (the lighter ones moved up the filter paper with the water, while the heavier ones adhered to the filter paper longer.)
In my team’s investigation, we were trying to figure out four unknown powders based on the known powders we had. Our research question was, how do different chemicals change the color of the flame. First in the experiment, we prepared our lab space by making sure we had a clear countertop and had a beaker full of water ready for the hot splint to be dumped into. We all put our hair back and put our goggles on and then proceeded to turn the Bunsen burner on. After we put the Bunsen burner on, Mr. Young adjusted our flame and we sent someone to grab the first chemical to burn. We burnt chemicals on the wooden splint one after one observing the color the flame produced, recording the color, and proceeded to put the splint in the water afterwards.
When compressed or exposed to great heat the mineral binds together in small to large clumps forming calcium Carbonate Chips, however left in it's formed state it is powder, a chalk like substance. I could use either forms of the Calcium Carbonate for the experiment. Hydrochloric Acid, is a clear, colourless to slightly
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
In this experiment, there was a variety of materials used. The materials needed for this experiment are:
Baking soda and vinegar together is a chemical change. Evidence of this change is it rises up, a gas is produced, you can hear a sizzle sound, and produces a white foam. The chemical property is chemical reactivity. The types of matter that are reacting are baking soda (NAHCO3) and vinegar (CH3COOH).
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
People don’t know how hard it is to find the properties of a mysterious mixture. Well, a group of 8th graders decided to find out. They tested possible substances by mixing them together. When they added water, the result was fizzing and bubbling. After a lot of testing and comparing, they thought the mystery mixture was Citric Acid and Baking Soda.
Write down which liquids made a fizzing sound when the baking powder was added, and write down which liquids didn't make a fizzing sound. Now, look at all the liquids that made the baking powder fizz. Is there anything similar about these liquids? Think about that. Do the same thing for the liquids that didn’t make a fizzing sound.
I made it through the orientation, where we got T-shirts and lanyards. After orientations, we headed to the chemistry lab. At the chemistry lab, we did a lab in which we used chromatography to distinguish between different medications. We ground up the unidentified medication we had and put .01g of it into a 10ml beaker of ethanol. From here, we took a sample of it and placed it on chromatography paper along with the other control medicines. We placed the chromatography paper into a chromatography solution and closed it with a tin foil liquid. The solution traveled up the paper carrying with it the solution with the unidentified medication and the control medications. After the solution traveled all the way up the paper, we looked at it under a UV light, to show where the medication traveled up the strip. The unknown medication lighted up with the same pattern as Bayer, a medication with only
Although people enjoy them, many people are allergic to some of the main ingredients in bath bombs. The objective is to find alternatives to some of these main ingredients and to find the ingredient that causes the bath bomb to fizz the most and the fastest. The different ingredients were lemon juice, cornstarch, and cream of tartar. In each bath bomb, baking soda, sodium bicarbonate, was used. Baking soda is used because of its alkaline properties and based on each ingredient, it will react differently (“Sodium Bicarbonate” Hyperphysics). Citric acid is a white solid crystal found in fruits such as oranges, lemons, etc. When baking soda and citric acid combine, a reaction occurs, and once this mixture touches water, it fizzes, pops, and creates bubbles. The chemical equation for this reaction is C6H8O7+ 3NaHCO3 -> CO2 + H2O + CH3COONa. The formation of bubbles is from the carbon dioxide released from the reaction (“Fizzy Sherbert”). Lemon juice, commonly using for its cleaning properties, was another alternative ingredient. When lemon juice and baking soda combine, it causes a chemical reaction. Once they combine, they begin to fizz due to the carbon dioxide being released (Rogers, “Lemon Fizz”). Another alternative was cream of tartar because of the fact that it reacts well with baking soda. When the two react and are put in water, new molecules form such as
2- Using the available data to predict the physical and chemical properties of various chemical compounds.
My Science Fair experiment is based on four main products, ibuprofen, acetic acid, bleach, and bread. The name of this is experiment is "Bread vs. Chemicals." The goal of this experiment is to see what chemical bread can survive in the longest. I will do multiple trials of each type of chemical and record results promptly. I am going to have three containers, one for each chemical and place a piece of bread in each and see how long the bread can survive without falling apart to determine the results. This experiment falls under the category of food science. Food science is considered to be a broad topic that coincides with scientific principles and foods to better understand them. Maillard reaction is quite often referred to as the