... shaken until the color becomes pale. When the color is pale three drops of starch solution should be added until this solution clears. The amount of thiosulphate should be recorded. Using these solutions 1 milliliter of .01 M thiosulphate solution is equal to .056 milliliters of oxygen. The final step would be to calculate the concentration of oxygen per liter of water using the following ... formula: oxygen=(.056y1000)/50 y is the amount of ... it. Dissolved oxygen is a key to determining the state of a water environment. Dissolved oxygen content and biological oxygen demand can help ...

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... the University of Nebraska on the website ianrpubs.unl.edu, states that this filtration process is useful when it comes removing impurities such as chlorine and organic compounds that could be found in drinking water. Activated charcoal/carbon filters have many different systems that could be used in order to remove impurities that can cause odor or color change in drinking water. The different ... types of units, as shown below are, point-of-entry, line bypass, faucet-mounted, and pour through. The charcoal in each ... of these filters are used for removing mainly organic chemicals th...

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... second hole is plastic tubing that runs from the bottom of the Buchner flask to a Erlenmeyer flask. To the sidearm of the Buchner flask is rubber tubing that runs to a beaker filled with water. (See figure 2). Preparation of Chromium(II) Acetate Hydrate 12g mossy zinc is dissolved into a solution of 3g chromium(III) chloride and 10mL water in the Buchner flask, which is fully assembled. C. HCl ... is added slowly until the solution is pure clear blue. A solution of 18g sodium acetate in 16mL water in a Erlenmeyer flask is placed on the other end of the plastic tube. While hydrogen is be...

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... make it function properly as a whole (Ireland). Green plants synthesize their food themselves by the process of photosynthesis; this is why they are called autotrophs. During photosynthesis, chlorophyll containing cells of leaves on plants in the presence of sunlight use carbon dioxide and water to produce carbohydrate and oxygen. Photosynthesis relates to respiration because it is a circular cycle where oxygen released ... responsible for plants' photosynthesis. Chloroplasts are a double membrane organelle and the pigment chlorophyll is the compound that gives the plant that green color ...

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• Grade Level: Undergraduate

... any leaks. After seeing that the there were no leaks we used a marker to mark the line of our beginning starting place. We repeated the same process for the other tube, which contained only water. Once both tubes showed no leaks we placed a fishbowl full of water between our tubes and a lamp. We used a yardstick with centimeter measurements to place our tubes 75cm from ... the lamp. We turned the lamp on and waited six minutes to allow equilibrium for both tubes. We used the marker to mark the point of each equilibrium. After three-minute intervals we continued to mark each line with a ...

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... a microphone or electric larynx to one's throat and sounding like a computer or robot for the rest of their life. When one has this type of cancer his life is taken away. He can not swim, and he or she can barely take a shower. If any water gets into the hole where the larynx was removed he or she may drown. One other cancer ... caused by smoking is cancer of the mouth. This is called oral cancer. Some symptoms of this are small, pale lumps or a thickening of the mouth. After having this, many patients must have part ... lips or tongues cut out. This means no more great tastes. One def...

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... related halogen compounds and also nitrogen oxides. CFC's are a common industrial product, used in refrigeration systems, air conditioners, aerosols, solvents and in the production of some types of packaging. Nitrogen oxides are a by-product of combustion processes. At ground level, these molecules seem very harmless, but the truth is that as we release the CFCs, each "harmless" molecule has the ... capability of destroying up to 10,000 ozone molecules. Many people do not understand the serious effects of the UV-B radiation, which is basically high energy light rays that can penetrate d...

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... supercritical fluid carbon dioxide and somewhat soluble in water; aqueous solutions of caffeine quickly break down. Physical features: in solid form it is white in color and is prism-like crystals. It has no odor - it is odorless. Summary Of Article "Effect of Caffeine on Oxygen Consumption and Metabolic Rate in ... such and influence on oxygen consumption and carbon dioxide production) and lasted for 60 minutes. With similar caloric intake in both groups during the study period of 4 weeks, weight gain in the caffeine group was less, but in the control group the weight gain was significan...

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... major detergent cleaning agents. It is use to clean your body from bacteria, dirt and grease. There are many type of soap like bar soap (a solid soap which dissolve in water) and liquid soap (don't need to dissolve in water). How are detergents different from soap? There are many different things from soap and detergent mostly the material that they are made from ... ingredients of soap making are animal fat like goat fat or vegetable fat like coconut fat this is call fatty acid. It is combining with a chemical call alkalis by heat for several hours. Then salt is added to separate the m...

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... light, the elodea cells were able to photosynthesize and create oxygen, which turned the water back to a reddish color. From these three demonstrations, two hypotheses about photosynthesis were created to be tested. The two hypotheses were: 1. Heats speeds up the rate of photosynthesis. 2. Light directly increases the rate of photosynthesis. These to hypotheses were tested and conclusion can be made from the data. ... for twenty minutes. If there was to be a quicker rate in photosynthesis in any of the test tubes, then the water in that test tube would be a reddish color. Hypothesis 2: Li...

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... industrial applications. In the medical application, Barium enema is used to detect colon cancer. Radiologists use barium sulfate to examine a patient's intestines with a X-rays. When a patient drinks a suspension of barium sulfate in water or barium enema, the barium sulfate particles temporarily fill the digestive track. When the X-ray is taken, the intestines and other organs appear white. The X-ray picture shows clearly ... and as a rat poison. Chrome yellow ( barium chromate) is used as paint pigment in safety matches. Barium sulfate's perfect white color is used as a whitener in p...

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... seen as three things in the earth and they are solid, liquid and gas. These three standards all have some kind of water working in them. Liquid water has a stronger impact on how the earth controls high heat and the cooled. "Liquid water hits a number and when it gets cold it goes up to 4 degrees Celsius where it reaches its maximum density" (http://vava ... _rgqx.htm). Water is helpful because it has high heat it takes a lot of kilograms to disappear away." "1 kilogram of ice at zero degrees Celsius would be enough to lower the temperature of 1 kilogram of Aluminum over 570 degrees Cels...

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... 80 C, and the second was at 100 C. I wasn't positive on this day what the two liquids were, but I was guessing one was water and the other possibly isopropanol. Later I looked at past labs and got the boiling points of these liquids. Water's boiling point is 100 C, and isopropanol's is 80 C. DAY 3 On the third day, I boiled away the liquids in the mixture. It ... . I thought that the substance might be either salt or sugar. DAY 4 On day four, I tested salt and sugar in isopropanol and water. In isopropanol neither sugar nor salt dissolved. In water, they both dissolved. Since the substan...

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... at Oberlin College, and Paul Heroult, a French metallurgist. Aluminum is a silvery-white metal with a face centered cubic crystalline structure. It is a member of group IIIa of the periodic table. The symbol is Al; atomic number is 13; atomic weight is 26.98154; it's state at room temperature, 298 K, is a ... The first is 1) Sodium Aluminate the formula for this is Al2O2Na4. Sodium aluminate solution is an alkaline source of high-purity it is used for clarifying aid for raw-water and sewage treatment. It is also a pitch control and sizing agent in pulp and paper productions. It is ... T...

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... at Oberlin College, and Paul Heroult, a French metallurgist. Aluminum is a silvery-white metal with a face centered cubic crystalline structure. It is a member of group IIIa of the periodic table. The symbol is Al; atomic number is 13; atomic weight is 26.98154; it's state at room temperature, 298 K, is a ... The first is 1) Sodium Aluminate the formula for this is Al2O2Na4. Sodium aluminate solution is an alkaline source of high-purity it is used for clarifying aid for raw-water and sewage treatment. It is also a pitch control and sizing agent in pulp and paper productions. It is ... T...

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... first thing that cosmetologists have to deal with. The proteins are in hair and are fibrous proteins called keratin. Keratin proteins are made up of polypeptide chains. There are also many bonds that are composed in our hair, and they all deal with elements and proteins. The bonds are ... odorless, and colorless liquid known as Glycerol, is coluble in alcohols and water and slightly soluble in dioxide and ether. It is also soluble in solvents like dioxide and ether. However, it is insoluble in hydrocarbons. It has a specific gravity of 1.26 and when this liquid is cold it can crystalliz...

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... other ways but these are the most common occurrences. Chemical change results in the production of new substances. Two types of substances which are very important in everyday life are acids and bases. Acids are sour, water-soluble substances which are very useful in industry, household cleaning agents, and are used in ... acid in a deadly way. A chemical change in which an acid reacts with a base is called neutralization. It is called neutralization because equal amounts of acid and base produce a solution which is neutral. Chemical changes between oxygen and other active gases can be h...

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... carbon-carbon bonds, as mentioned earlier. They are extensively used in making crude oil and are considered good fuels because they burn completely to give carbon dioxide and water. It can also be a source of carbon monoxide in cases when it undergoes incomplete combustion. Another thing is that it can undergo thermal composition to give an alkene and a smaller alkane. Alkanes are ... known to have low boiling point compared to the other hydrocarbons because of their small surface area. This fuctional group when reacted with other substnces changes its color with the pattern, colorless ...

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... The moisture clings to my skin and hair. The wind blows my damp hair into my face, refreshing me with every gust. The salty smell of the ocean water and the dank seaweed hang in the air as if it were something I could touch. As I watch the red sun sink smoothly into the ... my ankles. The shore is peppered with small, round stones that have been pounded smooth by the tide. There are seashells of all shapes and sizes peeking up from beneath the sand. As I stroll along the water's edge, I come across a seashell no bigger than a golf ball. I pick it up to examine it. It is ... when I turn ...

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... The moisture clings to my skin and hair. The wind blows my damp hair into my face, refreshing me with every gust. The salty smell of the ocean water and the dank seaweed hang in the air as if it were something I could touch. As I watch the red sun sink smoothly into the ... my ankles. The shore is peppered with small, round stones that have been pounded smooth by the tide. There are seashells of all shapes and sizes peeking up from beneath the sand. As I stroll along the water's edge, I come across a seashell no bigger than a golf ball. I pick it up to examine it. It is ... when I turn ...

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Mars The planet Mars is nicknamed the god of war. The Planet probably got its name from its red color, Mars is sometimes called the red planet. Mars" orbit is significant because it is elliptical. Mars average temperature is about -55C ... than the earth's and a thin crust. With Mars relatively low density compared to the other planets its appears that its core probably contains a relatively large fraction of sulfur in addition to iron. Mars also appears to lack active plate tectonics . Having no lateral plate motion, hot spots under the crust stay in a fixed ... position relative to the su...

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... ten million known carbon compounds, many of thousands of which are vital to the basis of life itself. (web site #1) Carbon occurs in many forms of nature. One if it's purest forms is diamond. Diamond is the hardest substance known on earth. Although diamonds found in nature are colorless and transparent, wen combined with other elements it's color can range from pastels to black. ... Diamond is a poor conductor of eat and electricity. Until 1955 the only sources of diamond were found in deposits of volcanic origin. Since the scientists have found ways to make diamond from graphite and o...

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... rocks resemble basalt lava, and the soil chemistry is like that of weathered, altered basalt. There are water and sulfur compounds in the soil. The sky is not blue but pink, its color caused by fine suspended particles of red dust. The polar caps are largely made of water ice. The winds at the surface of Mars are light, 15 miles per hour. The surface temperature ranges ... from about -120 •X F ! at night to -20 •X F in the afternoon. Fog and clouds occur despite the fact that the water content of the atmosphere is less ... than 0.1 percent that of the air on Earth. The surface pres...

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... °C. Silicon would be classified under Metalloids. Its standard state is a solid. When this element is pure it is a blue-gray color. Silicon is the second most abundant element on Earth. It makes up about 25% of the Earth's crust by weight. Silicon can be found in the sun and stars. Silicon forms very stable compounds. Silicon is not found free in ... , a material with excellent mechanical, optical, thermal, and electrical properties. Silicates make up some of the hardest; most beautiful sought after minerals such as aquamarine and emerald. Silicone is another material made up from silico...

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... catalase is converted, sulfuric acid (H2SO4) stops the reaction. After the reaction is stopped the amount of H2O2 remaining is measured by the use of potassium permanganate (KMnO4) added in drops until the solution turns a reddish brown or pink color, the final reading on the titration tube is the amount of H2O2 that remains in the solution. PART B: In order to determine the amount ... of H2O2 initially present in a 1.5% solution, 10mL of H2O2 is added to a beaker followed by 1 mL of H2O and 10 mL of H2SO4. after mixing thoroughly, 5mL of the solution is removed and assayed for ... bod...

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