5.05 Candy Chromatography Lab Purpose: Chromatography is used to separate mixtures of substances into their components and also to identify them. The purpose of this lab is to separate pigment from Skittles to observe colors that are not shown. Background information and research: Paper chromatography is a technique that is used to determine and separate parts of a mixture in order for identification. Paper chromatography is used to identify chemicals such as inks and dyes Materials: 4 pieces of candy with a colored coating (Skittles: Red, Green, Orange, Purple)
Pertaining to the appearance of the oil and water before the reaction occurs, oil “sits” on top of the water because oil is less dense than water, and therefore rests on the surface of the water. The Alka-Seltzer, or effervescent tablet, reacts with the water and produces bubbles of carbon dioxide gas. This gas is less dense than both the water and oil, so it travels the the surface of the liquid, pulling a small amount of the colored water with it and creating the “lava lamp” effect. The chemical reaction that is occurring is an acid-base reaction, and results from the reaction between the ingredients in the Alka-Seltzer tablets.
Experiment 1: Materials: • Alka-Seltzer tablets • Empty and clean water or soda bottles (12 oz to 24 oz) • Balloons • Water • Clock • Stove top Procedure: 1. Pour a sufficient amount of water (about 16 oz) into a small pot and place on the stove at high heat. 2. Watch the clock and after 30 seconds take the water off the heat.
The control in the experiment is water. Units used while timing the productivity of gas from an Alka-Seltzer tablet in different temperatures is, seconds. In order to find out if temperature controls the rate of chemical reaction, whether hot water is a more effective way to make the gas produce at a faster speed, it would be necessary to compare the results of different temperatures at the end of each trial. In order to do this the scientists will measure the volume of gas that is produced within a 10 second interval time after the tablet begins to react.
Large bubbles with a short duration indicate a higher alcohol content, while smaller bubbles that disappear more slowly indicate lower alcohol content. A common folk test for the quality of moonshine was to pour a small quantity of it into a spoon and set it on fire. The theory was that a safe distillate burns with a blue flame, but a tainted distillate burns with a yellow flame. Practitioners of this simple test also held that if a radiator coil had been used as a condenser, then there would be lead in the distillate, which would give a reddish flame.
Alka-Seltzer is a medical drug that works as a pain reliever and an antacid. The pain reliever used is aspirin and the antacid used is baking soda. When sodium bicarbonate dissolves in water it splits apart into sodium and bicarbonate ions. The bicarbonates reacts with hydrogen ions from citric acid to form carbon dioxide gas and water. This is how the bubbles are made.
Senses: How we Identify Different Flavors of Food Aim: To be able to identify the five different fruit flavors of skittles by using the sense of taste, while the participants of this experiment are blindfolded. Research Question: How are we able to identify the five different fruit flavors of skittles (strawberry, orange, grape, lime, and lemon) by only using our sense of taste? Hypothesis: I believe that the blind fold will make it harder for the participants to determine what fruit flavored skittle they have just ingested. This may also alter their perception of taste.
Carly Herrin American counterculture of the 1960s was one of the most powerful movements that had a lasting influence on American society in the following decades. The counterculture movement is strongly associated with the hippies, sexual revolution, and the protests against Vietnam War. The movement was shaped up by the rejection of the social norms of hippies’ parents but evolved to embrace more specific political and societal goals, including the withdrawal from Vietnam, environmentalism, gender equality, and the expansion of civil liberties. “The Electric Kool-Aid Acid Test” by Tom Wolfe is an excellent non-fiction work that allows to see the movement from the inside and in the specific details of the daily hippie life. Even though the
Abstract: The purpose of this experiment was identifying two compounds in an unknown mixture via liquid-liquid extraction and acid-base reactions. The compounds in the unknown mixture isolated by using recrystallization, and then their identity was determined by comparing the experimental melting point values with actual melting points. Unknown mixture 5 contained a carboxylic acid, 4-methylbanzoic acid, and a non-ionizable organic compound, 1,2-diphenylethane-1,2-dione.
Research Question: To investigate and compare how different temperature (5℃, 15℃, 25℃, 35℃, 45℃) can affect the concentration of carbon dioxide in soda water through titration with sodium hydroxide solution. Introduction: Carbon dioxide plays an important role in soft drinks. Soda water is manufactured by pumping carbon dioxide into water under high pressure. Carbon dioxide dissolves in water to form carbonic acid, which is the fizz we find in soft drinks. CO2 + H2O ⇌
Then the balloon is lifted up so that the baking soda runs into bottle to react with the vinegar inside. Immediately the balloon is inflated by the carbon dioxide formed. The baking soda is kept constant when the experiment is repeated for another different amount of vinegar. Results/Findings When sodium bicarbonate and vinegar mix,
Joshua Miller 12/18/17 Fermentation Lab report Introduction The term fermentation refers to the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat (wikipedia). Sugars are converted to ethyl alcohol when fermentation happens. In this experiment we determined if yeast cells undergo fermentation when placed in a closed flask with no oxygen. Glucose and yeast are mixed together in a closed flask and allowed to incubate for about one hour.