Your students will become junior detectives, honing their forensic skills by solving the mysteries surrounding a fictitious "crime scenario". They'll conduct a series of forensic analysis activities to determine if a crime has been committed. Each activity is centered around a particular analysis technique to include toxicology, chromatography, finger printing, document analysis and simulated blood typing.
Visualize the potential contamination of groundwater. Construct mini-groundwater simulation models showing the movement of a simulated, colored pollutant. Determine under what conditions contamination occurs from a variety of sources such as spill, farms, and buried tanks and how polluted groundwater eventually reaches the drinking water supply. In the process, students learn about the water cycle, water quality, ppm and ppb pollutant contamination, porosity of soils, and other related concepts. Grades 6-10.
Observe the use of microbes for oil degradation. Model various spill scenarios and monitor the effectiveness of the provided freeze-dried oil-degrading microbe mixture in remediating the waste. Set up a simulated oil spill in water and treat it with the special microbial product to observe the physical changes degradation of oil film over time. Additionally, they simulate three spill scenarios on beach sand, gravel and cobbles in order to observe the difference in degradation rates. The class also explores bioremediation methods for other waste chemicals and compares their effectiveness to traditional clean-up methods. Grades 7-10.
Introduce your students to the fundamentals of chemistry. Provide your class with a basic understanding of the primary concepts of chemistry as they investigate how matter is classified, identify the various types of mixtures, and compare the properties of solutions with the properties for mixtures. They'll also learn to identify elements and compounds and study how chemical symbols, formulas and equations are used to describe chemical reactions. Grades 7-10.
Introduction to elements, compounds, and mixtures, along with changes that these substances undergo as well as the characteristics of some elements, symbols for elements, and structures that make up atoms. Common mixtures are separated by evaporation and chromatography . New compounds are formed and changes that indicate chemical reactions are observed. Reproducible manual that includes 10 activities/laboratories, vocabulary lists and definitions, and a complete answer key. Experiments include: Classes of Matter, Elements, Symbols for Elements, Atoms, Common Mixtures, Separation by Evaporation, Separation by Chromatography, and more. 24 Students in Groups. Materials needed but NOT included: goggles, tape. Grades 4-9.
Seven different solutions are combined in every possible combination and chemical properties are identified by observing their reaction with other solutions. Chemical reactions include gas production, color changes and formation of recipitates. Students use their information to identify 4 unknown solutions. Contains materials to conduct the experiment twice, safety glasses. For 24 students working in groups of 4. Grades 7-11.
Observe the color and state of matter for 14 different substances. Test liquids for the presence of odor and observe the texture of solids. Test the acidity or alkalinity of liquids. Test the solubility of solids in alcohol and water. All materials included except: water, stirring rod, graduated cylinder, balance, hand lens (optional), safety glasses, test tubes or depression plate for solubility test. Designed for 24 students in groups of 4. Grades 8-11.
Refill kit for 09725. Barium Chloride bottle 100ml, Citric Acid 1/4 oz, Dextrose 30cc, Gelatin 30cc, Hydrogen Peroxide 3% bottle 2oz, Ethanol Denatured Alcohol 20, Potassium Iodide 1% solution 100ml, Potassium Thiocyanate 100ml, Sudan IV 2oz, Sulfuric Acid 10% solution 100ml, salad oil 2oz, Benedicts solution 100ml, Iodine .1 normal 4oz, Biuret solution 100ml, Starch Acetic Acid solution 100ml, chemical absorbent pad.
Today's emphasis on the artificial and natural ingredients of the foods that we eat has placed new emphasis on the chemical composition of that food. Examine the chemical, nature of many familiar food products. Experiments in this module: Presence of sugars, starches, fats and proteins, fruit discoloration, chemical composition of milk, presence of iodine in salt, calcium propionate in bread and the qualitative test for vitamin C and sulfur dioxide.
Ideal field test kit for performing 4 important experiments on water pollution. Test water samples for dissolved oxygen content, chlorides, phosphates, and water hardness. This kit provides all the apparatus and materials necessary for performing each test several times. Comes complete with instruction booklet.
Find out what pollutes drinking water and how it can be made safe again following pollution. Conduct experiments on the chemicals and organisms that make water unsafe to drink and conduct an experiment on its purification. Learn the causes and effects of water pollution.
Also called glycerin or glycerine, Glycerol is both a colorless and odorless liquid, that is fairly viscous. It is a simple polyol compound, with a triglyceride backbone and 3 hydroxyl groups.
Cobalt chloride crystals are commonly used in classrooms for chemistry experiments and demonstrations, primarily to study chemical properties and investigate reactions involving moisture and hydration. The most notable uses include:
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Indicator for Humidity and Hydration: Cobalt chloride is a popular indicator for moisture because it changes color based on its hydration state. In its anhydrous form, cobalt chloride is blue, and it turns pink when it absorbs water. This property makes it ideal for demonstrating reversible chemical changes and teaching about hydration and dehydration reactions.
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Le Chatelier’s Principle Demonstrations: Cobalt chloride can be used to illustrate Le Chatelier's Principle. By adding water or applying heat to the crystal, students can observe the reversible color change, demonstrating shifts in equilibrium due to changes in temperature or the presence of a reactant.
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Testing for Water Presence: Cobalt chloride paper, which is made using the crystals, is used in chemistry and environmental science labs to detect water vapor in various gases or liquids.
Due to its potential toxicity and the fact that it can cause skin irritation, cobalt chloride should be handled with proper safety measures, including wearing gloves and protective eyewear.
Sodium acetate, lab grade, anhydrous, powder - 500g.
Silver nitrate solution (0.1 normal) is used in classrooms for various chemistry experiments, particularly for demonstrating precipitation reactions and studying properties of silver ions. It is commonly used in:
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Precipitation Reactions: When silver nitrate is mixed with solutions containing chloride ions (e.g., sodium chloride), it forms a white precipitate of silver chloride. This reaction is useful for teaching concepts like solubility rules and ionic equations.
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Halide Testing: It can be used to identify halides (chloride, bromide, and iodide ions) in solutions, as each halide forms a distinct precipitate color (white, cream, or yellow) with silver nitrate.
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Titration Experiments: In analytical chemistry, a 0.1N silver nitrate solution can be used for Argentometric titrations, such as the Mohr method, to determine the concentration of chloride in a sample.
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Biological Staining and Antimicrobial Studies: In some biology classes, silver nitrate is used for staining, and its antimicrobial properties can be demonstrated to show how it affects microbial growth.
Because silver nitrate can stain skin and other materials, safety precautions such as gloves and goggles should be used when handling it.
Limewater solution is commonly used for testing the presence of carbon dioxide in gaseous samples in school laboratories, and refining of sugar in a process called carbonatation. 4 liters.
Limewater solution is commonly used for testing the presence of carbon dioxide in gaseous samples in school laboratories, and refining of sugar in a process called carbonatation. 1 liter.
2,6-Dichloroindophenol Sodium salt (indophenol), reagent - 1g
