Barium chloride Calcium chloride Copper (II) chloride Magnesium chloride Potassium chloride Sodium chloride Unknown solids containing a single cation and labelled X‚ Y and Z Apparatus: Bunsen burner Insulation mat Platinum wire (or Nichrome wire)‚ Watch glass Safety precaution: As concentrated hydrochloric acid is corrosive‚ skin contact should be avoided. It is preferable to use polythene gloves and wear goggles while handling it. Copper (II) chloride and barium chloride are highly
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A Basic Guide to Cosmetic & Toiletry Development John Woodruff john.woodruff@creative-developments.co.uk 1 A Basic Guide to Formulating Cosmetics & Toiletries What is a cosmetic? Understanding product briefs From concept to product formulation Sources of information EU cosmetic regulations The global marketplace Cost effective formulation Product stability & preservation Example formulation techniques john.woodruff@creative-developments.co.uk 2 A Basic Guide to Formulating
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method of subtraction to find the mass of the sodium chloride directly. Start with a mixture of sand (SiO2)‚ sodium chloride (NaCl)‚ and ammonium chloride (NH4Cl)‚ and use these separation processes: sublimation filtration evaporation First "sublimate" the ammonium chloride (NH4Cl); heat the mixture until the ammonium chloride (NH4Cl) passes into the gaseous phase. The remaining solid will be a mixture of the remaining two compounds‚ sodium chloride (NaCl) and sand (SiO2); these compounds do not undergo
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ICSE Class X Chapter 5 Hydrogen Chloride and Hydrochloric Acid Hydrogen chloride (HCl) : Formula : HCl Nature : Covalent. Molecular Mass : 36·5u [i.e. HCl = 1 + 35·5 = 36·5] Occurrence : (i) Present in gastric juices. (ii) Present in volcanic gases. Laboratory preparation of HCl gas : Hydrogen chloride gas is prepared in laboratory by heating conc. H2SO4 with NaCl. NaCl + H2SO4 Heat → NaCl + NaHSO4 Heat → NaHSO4 + HCl Sodium hydrogen sulphate Na2SO4 + HCl
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we used a wooden stick soaked in a metal and nonmetal solution‚ hovered it over a bunsen burner‚ and recorded the color that the flame changed to. The seven solutions we tested were lithium chloride‚ strontium chloride‚ calcium chloride‚ sodium chloride‚ barium chloride‚ copper chloride‚ and potassium chloride. However‚ we had another four additional solutions‚ which had unknown chemical composition. Thus leading us to the guiding question of the lab: what are the identities of the unknown solutions
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Magnesium chloride‚ Zinc chloride‚ Sodium chloride‚ and Potassium. V. Procedure: In tube 1 add five drops of Lead nitrate. In tube 2 add five drops of Silver nitrate. Drop a strip of copper metal into tubes 1 and 2. Next add five drops of Copper sulfate into tube 3‚ five drops of Lead nitrate into tube 4‚ and five drops of Magnesium chloride into tube 5. Next drop a strip of zinc metal into tubes 3‚ 4‚ and 5. Add five drops of Zinc chloride into tube 6‚ five drops of Sodium chloride into tube
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thermoplastics Polyethylene Polystyrene Polypropylene Polyvinyl chloride Polymers in electronic applications Polyacetylene Poly(p-phenylene vinylene) Polythiophene Polyphenylene sulfide Polyanilines Biomedical applications Polycarbonate (diphenyl carbonate) Polymethyl methacrylate Silicone polymers Copyright © 2003 Marcel Dekker‚ Inc. Introduction 3 Specialty polymers Polyvinylidene chloride Polyindene Polyvinyl pyrrolidone Coumarone polymer have
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purpose of this lab is to study some of the physical properties of two types of solids – ionic and molecular. The samples used are sodium chloride (ionic) and camphor (molecular). The physical properties studied are odour‚ hardness‚ melting point‚ solubility in water and solubility in 2-propanol. It is observed that some of the physical properties of sodium chloride are no odours‚ hard‚ a high melting point‚ soluble in water and insoluble in 2-propanol; some of the physical properties of camphor are
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such‚ its major application is for cellulose acetate‚ a synthetic textile. Acetic anhydride is also a reagent for the production of heroin. Ester production Acetic acid can be used for synthesis of various esters like ethyl acetate‚ propyl acetate‚ n-butyl acetate‚ isobutyl acetate etc. These esters are commonly used as solvents for inks‚ paints and coatings. The esters are produced by acid catalyzed reaction of acetic acid with the corresponding
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Chewing gum has been a part of my daily schedule for the past 5 years. So‚ researching this item has shed some light on what I really have been chewing. Whether it was for refreshing my breath or just to take away a craving it has become a necessity for my day. What could be wrong with a five calorie snack that i’ve been chewing for a majority of my life. I was astonished with the ingredients found used to make the gum. Although I didn’t recognize any of the ingredients it still sparked my interest
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