Acetone C3H6O 58.08 -94.7 56.05 0.7845 Colorless fluid‚ pleasant spicy and sweet flavor. Ethanol C2H5OH 46.07 -114.3 (158.8 K) 78.4 (351.6 K) 0.789 Colorless transparent fluid‚ pleasant and burning flavor. Easy to evaporate. Sodium Hydroxide NaOH 40.01 318 1390 2.13 Molten
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EXPERIMENT 3: INTRODUCTION TO TITRATION – DETERMINATION OF THE MOLARITY AND CONCENTRATION OF SULPHURIC ACID BY TITRATION WITH A STANDARD SOLUTION OF SODIUM HYDROXIDE INTRODUCTION Reaction of acid and base is one of the most common reaction in chemistry. This reaction is also widely known as neutralization. In this experiment‚ we used titration technique which involves accurately measuring the volume of a solution required to react with another reagent. An indicator must be used to determine the
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In this experiment‚ we took two TUMS tabs and through a back titration‚ we were able to find out how much acid was needed to neutralize two tablets of TUMS. In the first process of the titration‚ we added excess HCl and then we had to back titrate it by adding NaOH. We had to do a standardization test because the NaOH has a high reactivity and that could cause a small change. The NaOH solution was supposed to have a molar concentration of .5 however when we standardized the solution we found the
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Solutions that are bases on the pH scale range from 8-14. Bases are high in pH‚ low in hydrogen ion and high in hydroxyl ion. Bases have a bitter taste and a slippery feel. Bases dissolve in water and are also an electrolyte. Examples of bases are sodium hydroxide and cleaning products. Solutions that are neutral have an equal amount of hydrogen ion and hydroxyl ion. An example of this is blood. Solutions that are neutral on the pH scale range are 7. Hypothesis It has been estimated that out of the
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Write your name here Surname Other names Centre Number Candidate Number Edexcel IGCSE Chemistry Unit: 4CH0 Science (Double Award) 4SC0 Paper: 1C Wednesday 25 May 2011 – Morning Time: 2 hours Paper Reference 4CH0/1C 4SC0/1C You must have: Ruler Candidates may use a calculator. Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ Fill at the top of this • centre number and candidate number. all • Answer
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react with active metals (group 1 or 2) to produce hydrogen gas‚ H2 and acids react with bases to produce salt and water. 5. Compare the three theories of bases. (7.01) An Arrhenius base is any substance that increases the concentration of hydroxide ions (OH-) when dissolved in water. A BrØnsted-Lowry base is one that accepts a hydrogen ion‚ H+. A Lewis base is any substance that donates a lone pair of electrons. 6. List 2 weak acids. (7.01) Ammonia‚ NH3 and pyridine‚ C5H5N 7. List
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Windalco comprises two alumina plants – Ewarton Works in St. Catherine and Kirkvine Works in Manchester. Alumina is a fine white material similar in appearance to salt. The Bayer process dissolves the aluminum component of bauxite ore in sodium hydroxide (caustic soda); removes impurities from the solution; and precipitates alumina tri hydrate which is then calcined to aluminum oxide. A Bayer Process plant is principally a device for heating and cooling a large re circulating stream of caustic
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N10/4/CHEMI/SP2/ENG/TZ0/XX 88106105 CHEMISTRY STANDARD LEVEL PAPER 2 Thursday 11 November 2010 (afternoon) Candidate session number 0 1 hour 15 minutes 0 INSTRUCTIONS TO CANDIDATES • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all of Section A in the spaces provided. Section B: answer one question from Section B. Write your answers on answer sheets. Write your session number
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External links Properties[edit] Phenol is appreciably soluble in water‚ with about 84.2 g dissolving in 1000 mL (0.88 M). Homogeneous mixtures of phenol and water at phenol to water mass ratios of ~2.6 and higher are also possible. The sodium salt of phenol‚ sodium phenoxide‚ is far more water soluble. Acidity[edit] Phenol is weakly acidic and at high pHs gives the phenolate anion C6H5O− (also called phenoxide):[7] PhOH ⇌ PhO− +
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separated using extraction. Three reaction tubes were used in the experiment. An acidic mixture containing benzoic acid‚ naphthalene‚ and phenol was weighed and placed in Tube 1 and the mixture was allowed to separate after adding saturated solution of sodium bicarbonate. The aqueous layer was then transferred to Tube 2. Contents of Tube 2 were allowed to separate and the aqueous layer was then transferred to Tube 3. To Tubes 2 and 3‚ concentrated HCl was added‚ and their pH was tested prior to heating
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