As the result of my experience this semester I can conclude that this experience was a life changing experience. The way I viewed things in the past about the environment has changed. In the past I was not aware of the importance of living a more sustainable life. Also, how protecting our environment is one of the today’s most serious issues. Some of issues and information that I learned throughout this semester was the web life, food web, overpopulation, mutualism & commensalism, climate change
Abstract: This Extended Experimental Investigation assessed the effects of the chloride salts; Lithium Chloride, Sodium Chloride and Potassium Chloride on levels of dissolved oxygen in samples of distilled water. The three salts and a control solution of pure distilled water were titrated thrice, each using the Winkler method, to determine the quantity of dissolved oxygen within the samples. It was expected that the saline solutions would have decreased dissolved oxygen content and that the larger
the electron configurations for each ion that is formed. Ex. H1+ = 1s2 2. Solid sodium chloride and solid magnesium oxide are both held together by ionic (electrovalent) bonds. a) Using s, p and d notation write down the symbol for and the electronic configuration of (i) a sodium ion; (ii) a chloride ion; (iii) a magnesium ion; (iv) an oxide ion. b) Explain what holds sodium and chloride ions together in the solid crystal c) Sodium chloride melts at 1074 K; magnesium oxide melts at 3125 K.
Diazotized Sulphanilic Acid 1. Dissolve 1.1 g of anhydrous sodium carbonate in 50 mL of water in a 100 mL conical flask. 2. Add 4 g of sulphanilic acid to the solution and heat it until it dissolves. A small amount of suspended material may render the solution cloudy. 3. Filter the hot solution and rinse the used filter paper with 2-5 mL hot water. 4. Cool the filtrate to room temperature, add 1.5 g of sodium nitrite, and stir until reaction is complete. 5. Pour this mixture
chlorides, sulfates as an anion (negative charged ions). Those solids can pass through a filter with pores of around 2 microns (0.002 cm) in size. Therefore TDS is a measure of the amount of material dissolved in water. The variations in TDS concentrations have enormous impacted on the aquatic life as it changes the density of the water that will limit the aquatic life growth or may cause death. Furthermore, on the aquatic plants, since higher solids (TDS, TSS) decrease the passage of light through water
dry ice is made from carbon dioxide gas. So in particular, it’s actually just solid blocks of carbon dioxide turning into a gas. Now that’s something! As far as we thought, it could have been just blocks of ice blown by a flamethrower. Then the carbon dioxide gas is pressurized and cooled until it forms liquid carbon dioxide. After that, it is injected into a block press in turn, turns the carbon dioxide liquid into a solid. Now that we understand what dry ice is, what is the other uses of dry ice
Melting points reported were determined in open capillary. The structures of the newly synthesized compounds were established using IR, 1H NMR, 13C NMR and LC-MS data. FT-IR Spectra was recorded on Jasco FT-IR Spectrometer, 1H NMR and 13C NMR were recorded in DMSO-d6 at 399.65 MHz and 100.40 MHz respectively. All the chemical shifts were reported in parts per million (ppm). LC-MS was recorded using Waters Alliance 2795 separations module and Waters Micromass LCT mass detector. Elemental analysis
Purpose: The purpose of performing the 2 gram lab was to obtain 2.00 grams of our solid product, barium sulfate. In order for barium sulfate to be a product, we decided to perform a double replacement reaction. Background: In order for barium sulfate to be a product, we decided to perform a double replacement reaction. A double replacement reaction occurs when two compounds with two elements in each compound combine. After they combine, the first element in the first compound combines with the second
The purpose of my experiment was to determine how the amount of salt affects the freezing point of water. My hypothesis was if I increase the amount of salt distributed in cups of water, then the freezing point of the water will decrease because salt dissolves in water while taking up volume simultaneously, which prevents water molecules from packing together and freezing. I tested my hypothesis by filling 16 nine ounce plastic cups with six ounces of water each. I then added one teaspoon of salt
In this experiment, we had an unknown sample from which we obtained a boiling point, IR (Infrared Spectroscopy) and H-NMR to determine the chemical structure of an unknown sample. To determine the boiling point of the unknown, we used a thiele tube with high-boiling oil inside. We inverted capillary tube in the small sample tube that was holding the liquid sample and gently started heating. We stopped heating after we could see a continuous stream of bubbles that were coming out of the capillary
Dry ice is a frozen carbon dioxide,a normal part of our earth’s atmosphere.Dry ice is a solid but turns into a gas which the term for this would be called sublimation.Sublimation occurs when the surface particles of a solid gains enough energy that they form a gas.Using dry ice is a way to keep the temperature low when a refrigerator is not available.People also use dry ice for projects and experiments. If you leave dry ice in a bowl at room temperature for several hours nothing would be left because
Introduction: In this assignment, I will be doing two experimentations on examining the impact of temperature on the Alka-Seltzer’s response time. The first experimentation that I will be doing involves some water that is room temperature. The second experimentation that I will be doing involves some water that is very hot. If I want to be able to figure out the impact of the temperature on water, I will have to document the time it will take for the Alka-Seltzer to go into solution. Materials:
Hydrogen atoms and one oxygen atom. The chemical symbol is H2O. Water is a odorless, colorless, and tasteless substance. There are three forms of water; liquid, solid, and gas. Heat is energy in the form of vibrating atoms. An ice cube is the solid form of water. Ice is colorless and odorless. Ice is a mineral, but it has to be in solid form to be qualified as a mineral. Because the molecules are locked in place, ice is hard and stiff.
If I add any other substance other than water the cornstarch will it still change into a solid-liquid matter? Colloids have the capability to change from a liquid to a solid by movement or even touch. Colloids often harden when they are being moved by if it’s in your hand it will turn into a liquid matter. According to("Science Activity: Is This Stuff a Liquid Or a Solid? | Exploratorium") l the main idea about this subject is to show how to make your own ooze. Isaac Newton identified the properties
RESEARCH REPORT Ice is the solid form of any liquid. A freezing point of a substances lowered by pressure. Most substances contract while frozen. Density of ice increase as the temperature of it rises. Molecules in solids are packed together very tightly in fixed positions. This makes it difficult for the solid to change shape. In liquids, molecules are close together but they can slide past one another and change places. Because of this, liquids can change shape easily. Ice was
two aqueous solutions of different ionic compounds were mixed? A double replacement reaction is a reaction between two aqueous compounds in which one component from each of the compounds exchange to form a precipitate. A precipitate is a resulting solid from the mixing of two aqueous compounds that react with each other. This experiment was performed to show the process of double replacement reactions and to explain when it experimentally occurs. To help display this, two aqueous solutions selected
The strategy recommended would match both external and internal fit that help Ice-Fili to increase its current market share (5%), maximise its long term profits and to achieve a sustainable competitive advantage. To dominate the Russian ice cream market and maintain its market leader position, it has to brand itself as the top historical Russian ice cream producer and strengthen its core product in the impulse segment. Due to little product differentiation, there is low brand loyalty for consumers
ice crystals from snow that is collected into one space. A solid, such as ice, contains particles that are not flowing freely and have their own defined space. All particles, even in solids, vibrate, but how fast they move depends on the amount of energy they have. That energy is measured in terms of temperature, or average kinetic energy, of the solid. When a solid is warm, its energy is greater and its particles move faster. When a solid is cold, the opposite is true,
In one of the experiments, the experimenter uses coke, lemonade, water, red party cups, and a thermometer. They put a measuring cup of each liquid into cups and they freeze them at 32 degrees Fahrenheit. The water froze the quickest, freezing within 2 hours. The Coke came second at 2 hours and 15 minutes. The lemonade froze the slowest at 2 hours and 35 minutes. The next site talks about how lakes, ponds, and puddles freeze in cold temperatures, but how the ocean doesn't. The reason for that is because
Sophia Vines Honors Chemistry Period 3 Group 1 September 30, 2016 Topic: Ice Melting Alternatives Background Research Since salt is an effective way to melt ice that is harmful to the environment, the objective of this experiment is to find a more eco-friendly alternative. For this experiment, the scientist will find out how effective sugar and fertilizer are at melting ice compared to table salt. The independent variable is the different de-icing agent (salt, sugar and fertilizer.) The dependent