lefttop Alfred Werner was the first Swiss citizen and also the first inorganic chemist who win the noble prize in 1913 for his coordination theory of transition metal-amine complexes. He was awarded the Noble Prize with the prize motivation state as “in recognition f his work on the linkage of atom in molecules‚ by which he has thrown fresh light on old problem and opened new field of research‚ particularly in inorganic chemistry”. Werner was born on 12 December 1866 in the French region
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ammonium chloride‚ the paper was changed to red whereas the red litmus paper stayed the same indicating that the solution was acidic. PH levels shown through pH probe also ranged between 5.5 to 6.0. Yet when in the presence of sodium acetate blue litmus stayed blue whereas red litmus turned blue‚ indicating its basicity. pH probe also showed the solution’s pH varied between the line of 10 to 14. Calcium chloride was also observed to be acidic. The only conflicting result was sodium chloride‚ which
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evaporation. A simple-steam distillation apparatus was assembled and a mixture of water and cloves distilled to separate the eugenol from other clove components. The use of a solvent‚ Methylene Chloride was then used to isolate the Eugenol‚ and then dried using anhydrous sodium sulfate. The Methylene Chloride was then decanted and evaporated yielding the isolated eugenol product. A percentage weight recovery of 3.6% was calculated and compared to an expected recovery of 10%(Wenquiang‚ et al.‚ 2007)
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opposite charge? Sodium Chloride has a much stronger force of attraction to the particles because there is no evident odor and seems to have a very high melting point as oppose to camphor which has a very strong‚ evident smell. 12. Water is a much more polar molecule than 2-propanol. How does the polarity of the liquid seem to influence the solubility of these solids? Water is more of a polar molecule then the given 2-propanol which allows ionic soild‚ sodium chloride that breaks off and becomes
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Solubility product The Solubility product is related to SPARINGLY SOLUBLE SALTS ONLY!!!!! Examples are silver chloride‚ lead(II) chloride‚ calcium sulphate (in other words‚ it deals with salts commonly called insoluble salts) Consider a sparingly soluble salt MX Imagine the reaction that occurs when the solid is placed in water aMX (s) + H2O [pic] aMn+ (aq) + bXm- (aq) The equilibrium expression would be [Mn+]a [Xm-]b [MX]a [H2O]
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hydroxide. What is my theoretical yield of lithium chloride? b. I actually produced 6 grams of lithium chloride. What is my percent yield? 5) Given the following equation: C3H8 + O2 ( CO2 + H2O a. If I start with 5 grams of C3H8‚ what is my theoretical yield of water? b. I got a percent yield of 75%. How many grams of water did I make? 6) Be + 2 HCl ( BeCl2 + H2 My theoretical yield of beryllium chloride was 10.7 grams. If my actual yield was 4.5
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a clear aqueous solution‚ calcium chloride‚ water‚ and a gas. The gas was concluded to be carbon dioxide‚ since the wood splint was extinguished after it was exposed to the gas in the test tube. In the fifth reaction‚ the two reactants‚ copper(II) chloride and zinc produced a permanent color change in the solid substance in the aqueous solution. The remaining solid appeared to be black reddish and concluded to be copper‚ where the aqueous solution is zinc chloride. The six reaction resulted in the
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an acid is replaced by a metal ion or an ammonium ion‚ NH4+. Salts Nitrate salts Carbonate salts Chloride salts Soluble All nitrate salts Potassium carbonate‚ K2CO3 Ammonium carbonate‚ (NH4)2CO3 Sodium carbonate‚ Na2CO3 All chloride salts Except Sulphate salts All sulphate salts Except 2. Preparation and purification of soluble salts Lead (II) chloride‚ PbCl2 Silver chloride‚ AgCl Mercury Chloride‚ HgCl Lead (II) sulphate‚ PbSO4 Barium sulphate‚ BaSO4 Cacium sulphate‚ CaSO4 Persatuan Bahasa Cina
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Writing Complete Equations Practice For each of the following problems‚ write complete chemical equations to describe the chemical process taking place. Important note: There are a few physical processes on this sheet – You can’t write an equation for a physical process! 1) When lithium hydroxide pellets are added to a solution of sulfuric acid (dihydrogen sulfate)‚ lithium sulfate and water are formed. 2) When dirty water is boiled for purification purposes‚ the temperature is brought up to
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attributes. Each record contains a set of attributes and one attribute (quality) is the class.Theattributes considered are: 1 - fixed acidity‚ numeric 2 - volatile acidity‚ numeric 3 - citric acid‚ numeric 4 - residual sugar‚ numeric 5 – chlorides‚ numeric 6 - free sulfur dioxide‚ numeric 7 - total sulfur dioxide‚ numeric 8 – density‚ numeric 9 – pH‚ numeric 10 – sulphates‚ numeric 11 – alcohol‚ numeric 12 – R/W‚ nominal – R= red‚ W = white Class: quality (score between 0
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