Experiment 10: How much CO2? Introduction The goal of this lab was to determine the amount of grams of sodium bicarbonate (NaHCO3) required to produce enough CO2 gas to completely fill the lab and also how many Alka-Seltzer tablets that would equate to. This was done by collecting CO2 gas by inverting a buret and submerging it under water in order to calculate the volume of CO2 released from a fragment of Alka-Seltzer tablet. The main component of Alka-Seltzer is sodium bicarbonate‚ used to neutralize
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Huang SCH4U7 November 21st‚ 2012 Data Collection and Processing Concentration of the standard HCl solution: 0.1 M Data Collection: | Trial 1 | Trial 2 | Trial 3 | Final HCl Buret Reading ± 0.05 mL | 38.3 | 45 | 54.5 | Initial HCl Buret Reading ± 0.05 mL | 29.9 | 38.3 | 45 | Volume of NaHCO3 used ± 0.1 mL | 9.2 | 9.5 | 9.8 | Qualitative Data: * I used the methyl orange indicator which was suitable for my titration because of
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Quantitative Analysis of Soda Ash by Double-Indicator Titration ABSTRACT This experiment aims to analyze the percent composition of a substance mixture by using double indicator titration. The analyte used is the soda ash which is titrated with an HCl titrant‚ standardized by 1o Na2CO3. The indicators used are phenolphthalein for basicity and methyl orange for acidity. The two volumes of the titrant are then used to calculate percent composition of soda ash analyte. Statistical parameters such
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546 × 106/117 (1) = 495 kg Na2CO3 (unit required) (1) or moles NaCl = 546000/58.5 = 9333 (if 9.33‚ allow 3 max) (1) moles NaHCO3 = moles NaCl = 9333 (1) moles Na2CO3 = ½ moles NaHCO3 = ½ × 9333 = 4667 (1) mass Na2CO3 = 4667 × 106 = 495 kg (unit required) (1) or mass ratio NaCl: NaHCO3 = 58.5 : 84 (1) mass NaHCO3 = 546 × 84/58.5 = 784 kg (1) mass ratio NaHCO3 : Na2CO3 = 168 : 106 mass Na2CO3 = 784 × 106/168 (1) = 495 kg (unit required) (1) 4 (b) 0.537 g in 100 cm3 scaled to 5
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Experiment 2 Title: preparation of a halogenoalkane Objective: To synthesis 2-cholo-2-methylpropane by using corresponding alcohol and HCl(aq). The reaction is via SN1 of tertiary alcohol. Techniques: i) Distillation of the reactant and the product ii) Purification by separating funnel Theory: In the experiment‚ SN1 reaction take place‚ HCl is added to initiate the reaction. The R-OH attack the H+ with the lone pair on O. Then the R-O+H2 bond breaks the release a water molecule and
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dissolve the .15g of the first unknown substance into the water. Once the substance has dissolved‚ the student will add 10 drops of bromocresol (indicator) into the beaker. After the student will fill the buret all the way up with HCl. Once that is done‚ begin titration. The HCl should be added into the beaker until the indicator turns green. After it turns green the student will then place it on a hot plate and heat it till the CO2 evaporates and it turns blue again. After that let it cool. Once the
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provided pre-diluted chemicals. Utilizing the 96-well plate‚ 2 pipit drops of each chemical were added to the wells in the following combinations: a) NaHCO3+HCl b) HCl+Bromthymol blue c) NH3+1 drop Bromthymol blue d) HCl+blue dye e) Blue dye+NaOCl followed by HCl f) NaOCl+KI followed by various test foods g) KI+Pb(NO3)2 h) NaOH+phenolphthalein i) HCl + phenolphthalein j) NaOH+AgNO3 k) AgNO3+NH3 l) NH3+CuSO4. Along the way‚ observations were made pertaining to the reactions witnessed. This experiment
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products used today. They can be synthesized by means of adding alcohols to hydrogen halides (such as HCl‚ HI‚ or HBr) resulting in nucleophilic substitution (specifically the SN1 reaction.) The experiment was done with the goal of synthesizing an alkyl halide from alcohol and a hydrogen halide. In order to do this‚ tert-butyl alcohol was mixed with HCl to form crude tert-butyl chloride. Solid NaHCO3 and CaCl2 were used to prevent possible hydrolysis of the product. It was then purified through distillation
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each solution in that position: NaCH3COO‚ HCl‚ HCN‚ NaOH‚ NH3‚ NaCN‚ KNO3‚ H2SO4‚ NH4Cl‚ H2SO3‚ NaHCO3‚ Na3PO4 and CH3COOH. In order of increasing pH: H2SO4: This is because the first hydrogen is strong and completely ionizes and the second is weak and ionizes very minutely. It is also a lower pH than HCl because the second hydrogen has a smaller amount of of ionization. HCl: Strong acid with 100% complete ionization
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Analysis of Soda Ash and Carbonate-Bicarbonate Mixture Submitted: February 27‚ 2013 Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract A standard acid solution like HCl can be used as titrant for the analysis of both soda ash and a carbonate-bicarbonate mixture. In the analysis of soda ash‚ the volume needed to neutralize the soda ash is used to compute for its alkalinity‚ in this experiment we obtained a 17.6 % alkalinity with an error
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