Variables Independent variable: The temperature of HCl is going to be changed. The temperature 10℃‚30℃‚50℃‚70℃ and 90℃ of hydrochloric acid will be used to conduct the experiment. The hot plate is going to be used to reach 30℃‚50℃‚70℃ and 90℃‚ that are higher than the room temperature. Ice cubes can be used with water bath to make 10℃ hydrochloric acid. Dependent variable: The time it takes for carbon dioxide gas produces up to 20mL of gas syringe is going to be measured. It will be measured
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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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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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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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titration of a 25.00 mL sample of H2PO4 buffer solution with 0.1 M HCl and 0.1 M NaOH. The volume of 0.1 M HCl is about double of the amount 0.1 M NaOH used to lower/raise the pH of a blood buffer. In this experiment‚ HCl (a strong acid) and NaOH (a strong base) are used as examples of strong acids/bases‚ and the titration with H2PO4 shows the effect on a buffer solution. The assumption was the addition of large amounts of HCl will lower the pH‚ while the addition of large amounts of NaOH will
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gastric acid (HCl). In order to determine which antacid is the more effective‚ four different brands of antacids were chosen‚ and tested. The purpose of an antacid is to balance out the pH inside a person’s stomach. PH is the measurement of molar concentration of hydrogen ions that are present in the solution (N. Tro‚ 733-735). If this experiment were to be repeated‚ it would be to show which antacid would be more effective to buy as a consumer. In this experiment an antacid is dissolved in HCl‚ and then
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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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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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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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The Great Antacid Culminating Lab Purpose: To determine which antacid tablet is the most effective. Materials: 3 different antacid tablets‚ thymol blue‚ droppers‚ pH probe and necessary cables‚ pH probe holder‚ retort stand‚ 1 mol/L HCl‚ droppers‚ five 150 mL beaker‚ mortar and pestle‚ graduated cylinder‚ balance‚ weighing dish‚ stir rod Procedure: 1) Gather all the equipment you will need to do the lab. You will be working in groups of 3 2) Calibrate the pH probe as you practiced the day
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