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.
Determine the relative effectiveness of various commercial sunscreen lotions under laboratory conditions. Can serve to promote scientific investigation of consumer products. The experiments consist of allowing light energy to act upon a photosensitive chemical agent with the blocking of the light energy dependent upon sunscreen employed. After the exposure the amount of chemical conversion is measured and plotted as a function of the "Sun Protection Factor", SPF. Kit is designed for 24 students working in groups of 4. Grades 6-8.
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.