Rgt/Pdt | Structure | Physical Properties | Hazards | acetone | | Physical State: LiquidAppearance: colorlessBoiling Point: 56.20CMelting Point: -95.30CDensity: 0.79 g/cm3 | Causes eye and skin irritation. May cause central nervous system depression. May cause liver and kidney damage. Causes respiratory tract irritation. Extremely flammable. | aniline | | Physical State: LiquidAppearance: oily - colorlessBoiling Point: 1840CMelting Point: -60CDensity: 1.0216 g/cm3 | Combustible. Hazardous in
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accomplished by lining the developing chamber with filter paper. Place a trimmed sheet of filter paper in the jar. Perform the following 3 TLC experiments: Stationary phase Mobile phase TLC 1 Silica gel 95% ethanol TLC 2 Silica gel 1:1 water : acetic acid TLC 3 alumina 95% ethanol 4. Place the TLC strip into the developing chamber with the spotted end at the
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(Creonenergy.ru‚ 2014) Bibliography: Creonenergy.ru‚ (2014). at: In-text: (de la Iglesia et al.‚ 2007) Bibliography: de la Iglesia‚ .‚ Mallada‚ R.‚ Men ’endez‚ M. and Coronas‚ J. (2007). Continuous zeolite membrane reactor for esterification of ethanol and acetic acid In-text: (Zhang et al.‚ 2014) Bibliography: Zhang‚ W.‚ Qing‚ W.‚ Chen‚ N.‚ Ren‚ Z.‚ Chen‚ J In-text: (Waldburger and Widmer‚ 1996) Bibliography: Waldburger‚ R In-text: (Figueiredo‚ Salim and Borges‚ 2008) Bibliography: Figueiredo‚ K.‚ Salim‚
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the centrifugal speed brings about the sedimentation of first the cytoplasmic large and small granules. RNA was obtained from the cytoplasmic fractions. After centrifugation‚ the supernatant was collected while the residue was discarded. Glacial acetic acid was added in the supernatant until it became slightly acidic. The obtained solution was again centrifuged and filtered through the cheesecloth. Centrifugation and filtration was performed many time until the supernatant became clear. The supernatant
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PLF: Cesar Rodriguez E-mail: ucla.cesar@gmail.com Midterm Review Session Chemistry 14BL Midterm Review Session *The information shown below is usually provided on the exam. Also‚ remember that calculators can be used on the exam.* Absolute Uncertainties 5.00 mL pipet: ± 0.01 mL 10.00 mL pipet: ± 0.02 mL Digital balance: ± 0.2 mg 50.00 mL volumetric flask: ± 0.04 mL 100.00 mL volumetric flask: ± 0.08 mL 25.00 mL buret: ± 0.03 mL Useful information pX = -logX pH = 14 – pOH Kw
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rudimentary. It was constructed as shown in the following picture: After finding the heat capacity of the calorimeter‚ the student and partner neutralized two acids and calculated the heat of neutralization. Those two acids were hydrochloric acid and acetic acid‚ a 1.0 M solution of each was used. Observation and Results: The Heat gained by calorimeter = 355.3 J and the heat capacity of calorimeter = 28.9 J/K. For the heat of neutralization of HCl-NaOH the heat gained by the solution was 2508 J whereas
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soda‚ a pure chemical called sodium bicarbonate‚ has the chemical formula: NaHCO3 When dissolved in water baking soda separates into sodium (Na+) and bicarbonate ions (HCO3- ): NaHCO3 ---> Na+(aq) + HCO3-(aq) Vinegar‚ a weak (5%) solution of acetic acid in water‚ partially dissociates into hydrogen ( H+) and acetate ions (CH3COO-): CH3COOH <--> H+(aq) + CH3COO-(aq) The reaction between baking soda and vinegar is actually two reactions‚ an acid base reaction followed by a decomposition
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Gas and Colors! With the variety of chemistry project topics it is often difficult to choose what to do. Let me help you out. You want something that is easy to do‚ is virtually guaranteed to work but that will show the judges away with your incredible chemistry knowledge. This is one of those projects… The project What happens during a chemical reaction? The hypothesis When a chemical reaction happens‚ the original substances change to form different products. The experiments • What a gas
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solution will decrease Materials: Agar Solution Preparation: *hand sanitizer/ hand wash soap *small container *1g of agar powder *0.25g of beef extract stock *60mL of heated water *electronic balance *small spoons (2x) *teaspoons (2x) *0.2M Acetic Acid Solution (pH of 3) *0.2M Sodium Hydroxide Solution (pH of a 11) *100mL beaker (3 x) *Bunsen burner *lighter *heat-proof mat *tripod *gauze mat *stirring rod *Petri dishes (6x) *small wooden blocks *fine black marker Agar Plate Inoculation:
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Trinity Grammar School Year 12 HSC Chemistry Semester 1 Examination (April‚ 2010) This examination contributes 15% towards your final assessment Time Allowed: 3 hours (plus 5 minutes reading time) Student Number:________________________________________ Format of paper Part A: 20 multiple choice questions (worth 1 mark each). All answers must be entered in the special multiple choice Answer sheet provided. Part B: Free response questions worth 80 marks in total. All answers must be written
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