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Paragraph about chemistry labs
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Lava Lamp Lab - Conclusion
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
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I confirmed this once I put a rubber stopper on top of the test tube. With all the pressure being built up, the rubber stopper popped off once the pressure was high enough. The new gas was lifting the colored bubbles of water until it reached the surface to escape, leaving the denser liquid to sink.
The reason that the water and oil didnt mix, was in fact, fairly simple. The water was more dense than the oil. Density is measured by dividing mass and volume of any substance. Water, by having a higher density, ended up underneath the less dense oil. Another reason is because of the water has polar molecules while the oil is nonpolar, meaning that no matter how hard you try they will never ever mix and end up separate. In the end my hypothesis was correct, but failed to
The hypothesis that was formed in this experiment was that decantation and distillation were the techniques that would be successful in separating the three layered substances. The oil on top of the mixture was to be decanted solely, and the salt and sand layers would be distilled and separated together on filter paper on top of boiling hot water. The reason that the oil is decanted is because it doesn’t mingle with the salt and sand layers, and in addition it was the top layer, which was thought to have been easy to separate first. And as for the sand and salt, sand doesn’t mix and dissolve in water compared to salt, which does in fact dissolve, so distillation was thought to be the proper solution to separating the two
Alka-Seltzer is made up of baking soda, aspirin, and citric acid which gives the tablet the fizz when dropped in any temperature water. “Alka-Seltzer is a medication that works as a pain reliever and an antacid. (Antacids help neutralize stomach acidity, which can cause heartburn.)” (Science Buddies, Carbonation Countdown: The Effect of Temperature on Reaction Time). To take the Alka-Seltzer tablet you have to dissolve it in water causing a chemical reaction to form and the whole solution begins to fizz. The fizz occurs since when you drop the tablet in the water the baking soda and the citric acid react causing the water to fizz also “sodium bicarbonate splits apart to form sodium and bicarbonate ions” (Science Buddies, Carbonation Countdown: The Effect of Temperature on Reaction Time). When the Alka-Seltzer is dropped in the water then a chemical reaction forms allowing the Alka-Seltzer to dissolve. Temperature is related to this experiment because the temperature affects how fast the hydrogen ions react with the bicarbonate ions and as the temperature increases the movement of the molecules increases in speed and vice versa (Science Buddies, Carbonation Countdown: The Effect of Temperature on Reaction Time).
That familiar fizzing you hear when you drop an Alka Seltzer tablet into a glass of water is the result of a chemical reaction, and chemical reactions are extremely prevalent when it comes to what living things do to carry out life processes. In addition, environmental conditions can alter the results of chemical reactions, and in this lab, we will be answering the
* It was almost impossible to tell when the Alka-Seltzer tablet had dissolved, each time the experiment was done. This was a huge problem for the experiment as this could have totally caused problems to the experiment. A special type of detector apparatus, which bleeped when the correct amount of Alka-Seltzer tablet dissolved, could improve this, each time the experiment was done.
The sand is If the water with Alka-Seltzer tablets is stirred during the reaction, then the rates of reactions will increase because the particles will be forced to make contact with each other and... ... middle of paper ... ...results anomalies because they are the outcome of dissociation of calcium and magnesium ions,. Evaluation: What is the difference between My results were very reliable, because by looking at my graphs I can see a trend that relates to my scientific background. It is also evident that I have obtained a reliable set of results when I see 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 bicarbonate then reacts with the hydrogen from the citric acid, and this reaction makes water and carbon dioxide. By mixing water with the Alka-Seltzer® tablet, the whole reaction process is started, and that process ultimately results in bubbles of carbon dioxide gas being given off. When the film canister is capped, this gas that is being given off is suddenly contained inside an enclosed space. The pressure inside the canister then rises until there is too much force for the lid to stay sealed (attached to the canister). The built up pressure is strong enough, and exerts enough force to push the canister quickly into the air, forming the
As the pressure drop increases in the column, it is observed that the degree of foaming becomes more violent and more spread out. When the pressure drop is relatively high, it means that the pressure exerted by the vapour is insufficient to hold up the liquid in the tray, causing the gas bubbles to appear on top of the sieve trays. To add on, the higher the pressure drop, the higher the velocity of the vapour passing up the column. As a result, more vapour will penetrate the liquid and more bubbles formation is observed. Due to more bubbles formation, the degree of foaming are more agitated, rapid and spread out.
The porpoise of these is to determine the Specific Heat. Also known as Heat Capacity, the specific heat is the amount of the Heat Per Unit mass required to raise the temperature by one degree Celsius. The relationship between heat and temperature changed is usually expected in the form shown. The relationship does not apply if a phase change is encountered because the heat added or removed during a phase change does not change the temperature.
Above is a table showing the experiments we performed. For each the given quantity of the substance was placed into a plastic bag and a reaction would occur. Experiment 1 was given to us. After mixing the solid ingredients together, placing the phenol red solution in the bag, squeezing the air out of the bag, and then tilting the bag, so that the phenol red solution could mix into the solids a reaction occurred. The reaction we observed from Experiment 1 was as soon as the Phenol Red hit the baking soda and calcium carbonate the mixture started to fizz and turn orange.
the gas pressure forces the product up the tube in the can and out of the nozzle
So what exactly is matter? Matter is anything that has mass and takes up space (blue book). The particle model, however, is different for the four types of matter. For solids, the molecules can only vibrate, but solids have a definite shape and volume. For liquids the molecules are able to slide past one another and has definite volume. Both gas and plasma don't have a definite shape or volume, but in gas the molecules can move freely and bump into each other, and in plasma the molecules have completely broken apart. These molecules are too small to see and are different for every object. So what do particles have to do with vinegar and baking soda reacting? Well acids and bases are made of elements. These elements are made of atoms which are made of molecules. So when you get down to it, the reaction between acids and bases all depend on the particles of the object.
All of these ingredients mixed together makes foam by a chemical reaction. The foam “bubble” is filled with oxygen; the yeast is used to remove the oxygen from the hydrogen peroxide. This process is very fast, and that is the reason the foam is formed. During the chemical reaction the bottle or tube starts to get warm. This chemical reaction is called Exothermic Reaction, which means it not only created foam it also created heat. This experiment is done in a long plastic tube. Once the process is occurring it starts to overflow out of the tube and looks like toothpaste. My second experiment is to compare the chemicals, the size of the foam and the reaction time. For the second run the ingredients are: potassium permanganate, 50% hydrogen peroxide, dish soap and water. Potassium permanganate is used for a bigger or larger reaction. It is an inorganic chemical and is a strong oxidizing agent. They are crystals with a bright purple color to them. The color of them is why this experiment eliminated food coloring. The chemical reaction between hydrogen peroxide and the potassium permanganate is very vigorous and it releases steam, but with the water and dish soap mixed in with the two chemicals makes it somewhat bubble and explode into a big tubular
Water titration method was used in constructing pseudo-ternary phase diagrams at ambient temperature by choosing tween 80 as surfactant and ethanol as cosurfactant to obtain the concentration range of components to attain stable microemulsions range. (Vyas et al 2006; Patel et al. 2009)The weight ratio of surfactant to cosurfactant (SMix) varied as 1:1, 1:2, 1:3, 2:1 and 3:1. For each pseudo-ternary phase diagram at a specific surfactant to cosurfactant weight ratio was mixed with oil at a ratio of 9:1, 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, 2:8 and 1:9 (w/w). Double distilled water was added drop by drop to each oily-surfactant mixture under magnetic stirring until the mixture became clear at a certain point. The concentrations were recorded in order to complete the pseudo-ternary phase diagrams, and then the contents of oil, surfactant, cosurfac...
Oil dispersant is a chemical mixture of surfactants and solvents that helps break up oil into small droplets following an oil spill. Similarly to the way soaps or detergent work, dispersants break up large oil slicks lying on the top of water into smaller manageable particles (Pam, 2010). Dispersants are primarily composed of solvent and surfactants. The role of solvents is to reduce the viscosity of surfactants in order to be easily sprayed. In addition, solvents promote the penetration of the surfactants into the oil slick. On the hand, surfactants are surface active agents that are used to reduce surface tension between water and oil so as to increase wettability. The effectiveness of oil dispersants depends on the hydrophilic-lipophilic balance (HLB) –which is a coding scale from 0, to 20. A zero value corresponds to the most lipophilic and a value of 20 is the most hydrophilic. Oil dispersants usually have HLB values from 8–18 (G.P.Lindblom,