Rotating spiral blades of screw conveyor push and convey raw materials to concrete mixer. Raw materials do not rotate with spiral blades due to the self weight of materials and friction resistance between screw conveyor wall and materials. Henan Daswell Machinery Co.‚ Ltd‚is a professional manufacturer and trader specializing in the research‚ development and production of construction machinery for nearly 30 years. Our main products are as follows:cement mixer‚beton mixer‚etc. We will provide
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Cork Rocket Target Grade: Hopefully 10 to 14 year olds Objectives: To show student how chemical reactions can react with one another to create totally new compounds. Liquids and solids can combine to create gasses with practical and fun applications. Materials: A litre-bottle‚ Cork (if cork doesn’t fit into bottle‚ either cut it‚ or place paper towels around it so it will fit snugly into neck of bottle)‚ Paper Towels‚ Streamers (or anything light and dangly‚ paper is okay if it is in
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Make a Tornado in a Bottle Learn how to make a tornado in a bottle with this fun science experiment for kids. Using easy to find items such as dish washing liquid‚ water‚ glitter and a bottle you can make your own mini tornado that’s a lot safer than one you might see on the weather channel. Follow the instructions and enjoy the cool water vortex you create! What you’ll need: Water A clear plastic bottle with a cap (that won’t leak) Glitter Dish washing liquid Instructions: Fill the plastic
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possible to the equivalence point. In this experiment‚ the analyte was the soda ash sample and the titrant was the HCl which was standardized by a primary standard of known purity‚ the sodium carbonate. Standardization is the process in which the concentration of solution is accurately determined. A sample of sodium carbonate with 99.9% purity was dissolved in boiled water and titrated with HCl. Then‚ a sample of soda ash was dissolved in boiled water and then‚ titrated. In a this reaction of HCl
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covalent compound because both hydrogen and iodine are nonmetals. 6) Why would the bulb light up when placed in an aqueous solution of sodium chloride but not in a solid sample of sodium chloride? In a solid sample of sodium chloride‚ sodium and chloride are bonded together ionic and so there aren’t any free electrons to support the flow of electricity. When sodium
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Tiny particles/ blue Questions Use what you learned in this lab to answer the following questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? I would add HCl and it would bubble if it contained Sodium Bicarbonate B. You know what color phenolphthalein and bromthymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to test
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Preparation of Sodium Chloride through titration Abstract: acid-base titration is a technique commonly used to determine the moles of acid in a sample by adding a known volume of strong base of a known concentration. The strong base provides the hydroxide ion‚ to react quantitatively with the acid. The point at which the acid is completely and exactly consumed the known quantity of base is called the equivalence end point and is signalled by a colour change in the solution (end point). This colour
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| chicken | black | no presence of starch | Changes Questions Use what you learned in this lab to answer the following questions: A. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). How would you test this material for the presence of sodium bicarbonate? B. You know what color phenolphthalein and bromothymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to test several (at least 3) household items
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The chemical equation for Thiopental Sodium is C11H17N2NaO2S. First synthesized in 1935‚ the proper name for the drug is Thiopental Sodium it also goes by Sodium Pentothal but that is actually a trademark of the drug ’s manufacturer‚ Abbott Laboratories. A yellow water-soluble crystal‚ it is classified as an ultra-short acting barbiturate‚ a type of drug that depresses the central nervous system‚ slowing the heart rate and lowering blood pressure. Widely used in medicine as an anesthetic during surgery
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unknown sample of soda ash. BACKGROUND Sodium carbonate is an important industrial chemical. It is used in the manufacture of soap‚ glass‚ paper and as a source of alkalinity‚ that is‚ as a base. About half the sodium carbonate used in the United States is manufactured by the Solvay process. In this process‚ which is carried out at 0 °C‚ carbon dioxide is bubbled through a concentrated sodium chloride solution which is saturated with ammonia. Sodium hydrogen carbonate precipitates from the
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