Equipment: Thermometer, Stopwatch, Conical flask, Bunsen burner, Tripod stand, Measuring cylinder, matches, goggles, Paper marked with X. ... The flask should be placed on a paper marked with an X. The reaction is complete when a new yellowish substance is formed and the cross marked on the paper disappears .I will repeat this method again but this time, the temperature will vary as I will be heating the Sodium thiosulphate to 40 degrees. ... This clearly shows that the less time the chemical reaction takes to complete the faster the rate of reaction. ... In conclusion, altering the tem...

• Word Count: 1436
• Approx Pages: 6
• Grade Level: High School

Lab Report for Chemical Reactions Experiment Objective: In this experiment students will attempt a number of different reactions. The students will confirm that a reaction did/did not occur by detailed observation, and predict the products of each reaction by performing basic tests. Hypothesis: The reactions that contain acid will have a reaction, as well as the ones with the Bunsen burner. ... -Red litmus paper turns blue in the presence of a base. -Cobalt chloride paper turns white in the presence of water. ...

• Word Count: 266
• Approx Pages: 1
• Grade Level: High School

Chemistry open book paper Photochemical smog is a mixture of primary and secondary pollutants; primary pollutants are those released directly into the atmosphere from human activities such as burning fuels. ... Ozone is being produced all the time in the atmosphere by the reaction of oxygen molecules and atoms: O + O O 1 The oxygen atom in that reaction comes from the product of another reaction taking place. This reaction requires energy from the Sun in order to break the nitrogen dioxide. ... This reaction converts NO back to NO and therefore reduces the concentration of ...

• Word Count: 1852
• Approx Pages: 7
• Grade Level: High School

In photosynthesis, the primary energy production system for autotrophic organisms, many chemical reactions occur in order to construct the storage units for glucose and fuel synthesis. These reactions provide the backbone on which all ecosystems and food webs are based upon. ... With the atmosphere of the jar now saturated with solvent, the chromatography paper and polar properties of said paper and pigments on the paper were set to work resulting in movement and separation of the different pigments in the extract. When the pigments were separated enough visually, the paper was removed and ...

• Word Count: 903
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

For example, textile and paper are much more susceptible than others to light damage through photochemical reaction (Fynn 1948; Padfield 1965). ... Damages Found on Papers or Paper-Based Collections Paper or paper-based collections may not show distinct property changes in the initial stages of photochemical degradation. ... Some components within the paper are prone to cause this problem if the paper is made from mechanical wood pulp or ground wood pulp instead of pure cotton fibers, for example, it is more likely to discolor or to cause photochemical reaction when expose to sunlight (Banik &...

• Word Count: 1805
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

Apparatus list: Two small 100cm3 beakers, for the Sodium Thiosulphate and Hydrochloric acid A small 100cm3 conical flask to mix the fluids in A small conical flask that has a capacity of 35cm3 A piece of lined paper, to judge when the reaction has finished A stop-clock to determine the duration of the reaction A calculator to work out the average reaction rate A total of 280cm3 Sodium Thiosulphate A total of 80cm3 Hydrochloric acid A total of 280cm3 water Pilot study: A pilot study was conducted to see if the reaction being investigated actually worked, and if...

• Word Count: 817
• Approx Pages: 3
• Grade Level: High School

Introduction : This lab is based on calculating molar mass, balancing equations, and predicting the chemical reactions that take place in complex stoichiometry problems.Stoichiometry is the study of the quantitative relationship in a chemical equation and is the basis of the lab.Molar mass is the mass, in grams, of a single mole of a substance. ... The precipitate is the solid that seperates from the solution during the chemical reaction. ... Materials : Balance Ring Stand Clay Triangle Metal Ring 50mL Beaker (2) 50mL Graduated Cylinder 150mL Beaker 250mL Beake...

• Word Count: 491
• Approx Pages: 2
• Grade Level: High School

This paper will focus on the societal reaction perspective to crime and deviance as developed in the works of Edwin Lemert, Howard S. ... Finally the societal reaction perspective, also known as the labeling perspective, will be applied to a specific form of deviance, illicit drug use. Edwin Lemert was one of the first theorists to begin working on the societal reaction perspective, around the early 1950's. ... Although the work of Lemert, Becker and Kitsuse are all within the societal reaction perspective, there are some differences worth noting. ... The societal reaction p...

• Word Count: 1737
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

Objective The objective is to convert a regular penny into a gold penny using alchemy. Introduction Alchemy is the medieval forerunner of chemistry, based on the supposed transformation of matter. For example, alchemists convinced people that they could turn cheap metals into gold by doing certain ...

• Word Count: 601
• Approx Pages: 2
• Grade Level: High School

Most people believe that a paper airplane is a very basic children's toy that is cheap as well. ... Paper airplanes must generate enough lift to oppose the weight. ... This is according to Newton's Third law of action and reaction forces. ... Different types of paper for the glider will therefore effect the drag. ... There are three forces that act upon a paper airplane in motion. ...

• Word Count: 866
• Approx Pages: 3
• Has Bibliography
• Grade Level: High School

Paper towels were then laid across the back to discard the used up chromotography papers. ... Each ink was tested individually on its own piece of chromotography paper. ... The experimenters then observed the individual reactions and wrote them down. ... The experimenters observed the crime sample's reactions and compared it to those of the other inks. ... The chromotography papeer also broke down the components of the ink into its separate colors making it easy for the experimenters to observe the reaction and compare it to the reactions already obtained. ...

• Word Count: 522
• Approx Pages: 2
• Grade Level: High School

A few months ago, I had a 10 pages paper and its due on the next day. ... I tried to think about the topic first then brainstorm it but I still can't make a good 10 pages of paper. ... I decided to take a quick nap on the cards of getting a new fresh idea for my paper. I took a 1½ hours of nap and I started working on my paper again. ... As the result, I finally can find the best topic with the evidences to support my paper. ...

• Word Count: 1140
• Approx Pages: 5
• Grade Level: High School

EXECUTIVE SUMMARY The aim of this paper is to provide a clear scientific understanding of the common air pollutants we have in our world today. ... This paper is concerned with identifying and quantifying the health risks caused by human exposure to air pollution. ... Lastly, this paper will also examine potential solutions to eradicating air pollution, particularly primary air pollutants. ... These pollutants are known to react with the elements in the atmosphere such as nitrogen (78%) and oxygen (21 %) through chemical and photochemical reactions to create secondary pollutants (Wikipedia). ...

• Word Count: 2264
• Approx Pages: 9
• Has Bibliography
• Grade Level: Undergraduate

Investigating the effect of concentration on the rate of reaction between Sodium thiosulphate and hydrochloric acid Introduction I am measuring the rate of reaction (how fast a reaction takes) of sodium thiosulphate and hydrochloric acid. ... The beaker will be filled with Na S O and water via two measuring cylinders and placed on the A4 paper marked with a cross. ... Results There are two graphs behind this sheet of paper. ... The rate of reaction goes faster. ... The reaction was finished when the black cross on the A4 plain paper disappeared and this is only seen by the naked eye. ...

• Word Count: 977
• Approx Pages: 4
• Has Bibliography
• Grade Level: High School

Throughout this paper I am going to be discussing three theoretical perspectives on personality, which are Freud's Structural theory, Kagan's biological theory, and Humanistic theories. ... Another part of Freud's structural theory are defense mechanisms such as repression, rationalization, projection, denial, reaction formation, displacement, sublimation, intellectualization, and isolation. ... Expressing opposite feelings to hide real feelings is called reaction formation. ... I feel that he displays three defense mechanisms, which are: rationalization, reaction formation, ...

• Word Count: 2422
• Approx Pages: 10
• Grade Level: High School

An Inconvenient Truth Reaction Paper for "An Inconvenient Truth" The movie was composed of many documented events narrated and discussed by the former U.S Vice President Al Gore. ... " NEGOITA GEORGE ALEXANDRU (PME) – REACTION PAPER: AN INCONVENIENT TRUTH I have recently watched a documentary entitled "An Inconvenient Truth", released in 2006 and directed by Davis Guggenheim. ...

• Word Count: 6155
• Approx Pages: 25
• Grade Level: Undergraduate

After we experimented, we got half a dozen reactions. ... Our hypothesis was partly correct, but there were also other reactions that also took place. 2. ... Also, we hypothesized that not many reactions would occur with the elements and compounds given. 3. ... We first placed a micro plate on top of a thin sheet of white paper. ... We cleaned the metal strips with paper towels to ensure us that no foreign particles would be on the metals, causing an unwanted reaction. ...

• Word Count: 760
• Approx Pages: 3
• Grade Level: High School

Next, a dropper was used to drop one drop of 1% catalase onto the small disks of filter paper. The small disk s of filter paper were made before hand using a hole punch. The filter paper was then inserted into the test tubes with tweezers. ... In the results shown, at 10°C the filter paper took the least amount of time to float back to the top compared to the time it took in the test tube that was 35°C. ... The highest rate of reaction, known as the Initial Reaction Rate is the maximum reaction rate for an enzyme in an experimental situation (McCallum, 2011). ...

• Word Count: 2220
• Approx Pages: 9
• Has Bibliography

INTRODUCTION: Different features influence the reaction rate: (a.) 1st warm/cold temperature (meaning, the change in temperature). ... HYPOTHESIS: My hypothesis is that the higher the temperature the faster the reaction rate because of the faster moving particles, and the higher the concentration of Na2S2O3 (less dense solution with more water) the slower the reaction. ... After we placed the beaker on the paper with the drawn cross, as soon as we added the hydrochloric acid (which was constant; 1ml no mater...

• Word Count: 611
• Approx Pages: 2
• Grade Level: High School

Investigating the rate of reaction between sodium thiosulfate and dilute hydrochloric acid Background Research Word Equation for this reaction is: Sodium thiosulphate + Hydrochloric acid  Sodium Chloride + Sulfur Dioxide + Sulfur + Water Balanced Symbol Equation for this reaction is: Na2S2O3 (aq) + 2HCL (aq)2NaCl (aq)+SO2 (g)+H2O (l) Collision Theory The rate of a reaction is all about collision theory. ... As a result this means that the reaction is not as fast or successful. Concentrations of reactants in solution: In reactions which involve liquids, increasing the concentra...

• Word Count: 3666
• Approx Pages: 15
• Has Bibliography
• Grade Level: High School

From doing the investigation on rates of reaction I have found that the higher the temperature of a reaction, the quicker the reaction goes at. ... This agreed with my prediction, which was the higher, the temperature the quicker the reaction. The scientific evidence which supports this is the temperature of a reaction is increased this would then increase the rate of reaction. ... The experiment to investigate rates of reaction was okay. ... I will be concentrating on the amount of seconds taken for the disappearance of the cross, which will be on the paper beneath the beaker after ...

• Word Count: 672
• Approx Pages: 3
• Grade Level: High School

The second test that was made is the test for the reaction with bromine: effect of light. ... The first test tube must be wrapped with a carbon paper and the second test must remain as it is. ... After ten minutes we remove the carbon paper of the first test tube and compare it to the test tube without cover. ... The third test is a test for the reaction with cold dilute permanganate or the Baeyer's test. ... The fourth test is the test for the reaction of ammoniacal silver nitrate solution. ...

• Word Count: 995
• Approx Pages: 4
• Grade Level: High School

The only law of life that I have is to live a happy (not necessarily long) life, and this paper will tell how to live a happy life. ... This paper will do nothing less than say it. ... The first probable reaction from skeptics is, "that is just too simple!" ... But after that is said the next reaction is along the lines of, "Oh well then ill just shoot up heroin and play Grand Theft Auto III (The greatest game of all time) all day and live in happiness." ...

• Word Count: 347
• Approx Pages: 1
• Grade Level: High School

Using the weighed filter paper, obtain the recrystallized product by suction filtration. Transfer the crystals and filter paper onto the weighed watch glass. ... As a catalyst, a small amount of sulfuric acid is used to increase the rate of reaction. 4. ... The mixture was heated in a water bath for 10 to 15mins to complete the reaction. 5. ... Conclusion Aspirin was prepared from the reaction of salicylic acid and acetic anhydride. ...

• Word Count: 1573
• Approx Pages: 6
• Has Bibliography
• Grade Level: High School

There has never been a fatal reaction to marijuana in thousands of years and countless doses. ... The FDA approves many drugs each year, but they kill tens of thousands of people every year as abnormal drug reactions occur. ... Making paper from hemp would lessen our dependency on wood pulp. ... Over a 20 year period, one acre of hemp produces four times the amount of pulp for paper production as the same area of trees. Hemp fiber is longer than tree fiber; as a result, hemp paper recycles many more times. ...

• Word Count: 721
• Approx Pages: 3
• Has Bibliography
• Grade Level: Undergraduate