Materials: 0.20M HCl (±0.02moldm-3) 1.1g solid NaOH (±0.1g) A solution of vinegar of unknown concentration (density= 1.05gcm-3) Phenolphthalein Method: * A solution of NaOH was prepared by dissolving 1.1g in 250cm3 of water * 1.1g of solid NaOH was weighed and then dissolved in the stirred until dissolved in 250cm3 of water * 25cm3 of this solution was placed into a conical flask and 3 drops of phenolphthalein indicator were added * A burette was filled with 0.2±0.02moldm-3 HCl * The
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Iodine is a test for starch while Benedict’s solution is a test for reducing sugars. When solution A is tested by benidicts test‚ the clear blue solution changed to a little reddish and brick red precipitate is formed.this result show that solution A is a reducing sugar. When carried out iodine test with solution A‚ the colourless solution remain unchanged . this tell us that starch is absent is solution A. When solution B is tested with Benedicts test‚ the clear blue solution remain unchanged‚ we
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In my experiment I have found that 50 millilitres of HCL with 2 grams of sodium chloride had the highest conductivity rate compared to the second most conductive solution‚ 50 milliliters of vinegar with 2 grams of sodium chloride‚ and the last conductive solution‚ 50 milliliters of distilled water with 2 grams of sodium chloride. In my first hypothesis I stated if I added sodium chloride to distilled water‚ than the overall conductivity will become more conductive than just distilled water‚ since
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[pic] Drops |Water(HcL) |Water(NaOH) |Liver(HcL) |Liver(NaOH) |Egg White(HcL) |Egg White(NaOH0) |Potato(HCl) |Potato(NaOH) |Buffer(HCl) |Buffer(NaOH) | |0 |7 |4 |7.4 |5 |8.2 |7 |6.9 |4 |10.7 |10 | |5 |4.5 |7 |6.9 |6 |7.5 |8 |6.2 |5 |10.5 |10 | |10 |2.7 |9 |6.3 |6 |7 |9 |5.7 |5 |10.4 |11 | |15 |2.6 |12 |5.8 |6 |6.4 |9 |5.3 |6 |10.3 |12 | |20 |2.5 |12 |5.4 |6 |4.5 |10 |4.9 |7 |10.2 |12 | |25 |2.4 |13 |5.1 |6 |3.5 |10 |4.6 |8 |10.1 |13 | |30 |2.3 |13 |4.8 |6 |3.3 |11 |4.2 |8 |10 |13 | | 1.
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of the components of a buffer. For a given addition of acid or base‚ the buffer component concentration ratio change less when the concentration are similar than what they are different. Materials: Acetic acid (MW=60 g/mol)‚ NaOH solution (0.5M)‚ HCl solution (0.001M)‚ calibration buffer (pH3.5 and pH 5.5)‚ 7-UP‚ 100 Plus. Apparatus: pH meter‚ pipettes (10mL)‚ volumetric flask (250mL)‚ beakers (150mL)‚ burettes‚ burette holder and stand‚ funnel‚ graduated
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experiment. Reaction Equation: NaHCO3(s) + HCl(aq) ( NaCl(s) + CO2(g) + H2O(l) Materials: safety glasses baking soda (NaHCO3) 1 M HCl and dropper 500 ml Pyrex flask hot plate Procedure: 1. Find the mass of the 500 ml Pyrex flask. Record this mass in the Data Tables. 2. Add one teaspoon of baking soda to the flask‚ and record the total mass in the Data Table. 3. Use the dropper to drip HCl into the flask. Add HCl until the fizzing ceases. 4. Set the flask
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Discovering the Mystery of Eleven Test Tubes Karen Radakovich Ph.D. Mohammad Farhad Brittany Cina CH 223‚ Spring 08 Abstract: Eleven mystery test tubes labeled from K-1 to K-11 contained: 6M H2SO4‚ 6M NH3‚ 6M HCl‚ 6M NaOH‚ 1M NaCl‚ 1M Fe(NO3)3‚ 1M NiSO4‚ 1M AgNO3‚ 1M KSCN‚ 1M Ba(NO3)2‚ 1M Cu(NO3)2 respectively. The contents of the test tubes were determined by chemical experiments. Solution K-1 contained NiSO4 because when solution K-9‚ ammonia which was identified by its pungent odor
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saturated solutions described above. Since the solution is basic when the phenothelain is added a pink color is observed titrate it with HCL to find the equivalence point‚ which a clear color is shown. In each titration a pink color is observed and once HCL is added the equivalence point is reached the pink color disappears. Results Trial Mg(OH)2 (mL) HCl (mL) HCl (moles) Mg(OH)2 (moles) OH- (moles) Mg2+ (moles) 1 50mL 7.70mL 0.0000154 0.0000077 0.0000154 7.7x10-6 2 50mL 7.95mL 0.0000159
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Experiment # 4: Analysis of Soda Ash Experiment # 5: Volumetric Analysis of a Carbonate – Bicarbonate Mixture Submitted by: Eugenio December 2012 Department of Chemical Engineering University of Santo Tomas España‚ Manila Abstract Soda ash is the common name for sodium carbonate (NaCO3)‚ a chemical salt derived from carbonic acid. It is frequently used in manufacturing‚ industry‚ and in domestic chores. Glass production is one of the primary industrial uses for sodium carbonate. It is also
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number of moles of HCl reacted with the NaOH is 0.00216 moles‚ which is less than Gaviscon. The number of moles of NaOH that were added from the burette is 0.00327 moles (1 tablet of Gaviscon). However‚ for Quick-eze‚ the number of moles is 0.00216 moles (1 tablet). This means the average volume of the NaOH have affected the number of moles as the concentration of the sodium hydroxide is 0.1M. This means that if less NaOH was required to neutralise the acid‚ the number of moles of HCl neutralized by
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