solution? Sodium hydroxide solutions‚ especially in high concentrations‚ are toxic and corrosive. 2. (a) What buret reading should you record when the liquid level is as shown in Figure 2? In Figure 2‚ the lower meniscus lies below the 3 mL line and 4 minor gradations that signify 0.1 values. Estimating the uncertain digit to be 0.04 mL‚ the reading we record for this particular buret is 3.44 mL. (b) How will you recognize the end point of your titration? We know that that the end point of
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speed is set to be at 300rpm and reading is taken every 5 minutes till the outlet conductivity remains constant. From the conductivity measured‚ the exit concentration of NaOH and the conversion percentage can be calculated by referring to the calibration curve plotted. The performance of reactors can be compared by relating the conversion of the reactants to become products with the Residence Time Distributions (RTD) spent. From the data collected‚ single stage CSTR spent 6.52 minutes‚ 3-stages
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The buret will be filled with NaOH. The horizontal position of the orange handle is off for the stopcock. Click the Save button in the Buret Zoom View window. Open the stopcock by pulling down on the orange handle. The vertical position delivers solution the fastest with three intermediate rates in between. Turn the stopcock to one of the fastest positions. Observe the titration curve. When the volume reaches 35 mL‚ double-click the stopcock to stop the titration. Click Stop in the Buret Zoom
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in each dilutions will be use‚ to determine the linear function among various functions (T‚ T%‚ log T‚ - logT) For a Beer’s law calibration curve. The produce provides a model for guided-inquiry analysis of the concentration of food dye(s) in sports drinks and other consumer beverages. II. MATERIAL USED Beaker‚ 500-mL‚ 1 Beaker‚ 100-mL‚9 Pipets‚ serological‚ 10-mL‚ 2 Cuvets‚ 13 × 100 mm ‚ 1 Sample of consumer sports drink (Gatorade Blue)‚ 10-mL FD&C Blue 1 stock solution
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Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor
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11 November 2014 Chem 111 Experimental Chemistry I Section 104 The Pennsylvania State University Lab Report on Experiment 10- The Chemistry of Natural Waters Introduction What is water hardness? Water is extremely important to all living things and even to non-living things‚ indirectly. Therefore‚ the way water travels and gets to a place is also extremely important because its transportation methods determine the chemicals that get involved and added into the water as it travels. This relates
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boiled water to just below the neck and mix again. Label the flask. It now contains about 500 mL of approximately 0.1 M NaOH. Check out a buret from the stockroom. Rinse it well with tap water‚ then distilled water. Finally‚ rinse it three times with about 4 mL of your NaOH solution each time. Fill the buret with NaOH and cover the top of the buret with plastic wrap until you are ready to use it. Make a data table in your notebook. See the Report Sheet for a list of data entries and calculated
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Pre-Lab Questions: Mass of empty pipet 1.557 g Mass of empty pipet and condensed methyl alcohol 1.571 g Mass of pipet and water 16.001 g Mass of condensed methyl alcohol .014 g Mass of water in filled pipet 14.444 g Volume of pipet 0.014483--> 14.444 g(1ml/0.9973 g/mL)(1L/1000mL) Molar mass of methyl alcohol (experimental) 30.44 g/mol = (.014g)(0.082057)(372.65 K)/(.971 atm)(0.014483 L) Molar mass of methyl alcohol (theoretical) 32.04 g/mol 2a. If only part of the pipet was immersed in boiling water
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a phenolphthalein endpoint‚ what is the molarity of the NaOH solution? DATA: Standardization of NaOH Titrant | Sample 1 | Sample 2 | Sample 3 | Weight of KHP taken | 0.80 g | 0.60 g | 0.70 g | Initial NaOH buret reading | 1.80 mL | 2.10 mL | 1.64 mL | Final NaOH buret reading | 42.40 mL | 33.20 mL | 37.50 mL | Volume NaOH used | 40.60 mL | 31.10 mL | 35.86 mL | Moles of KHP present | .003917 mols | .002938 mols | .003428 mols | Molarity of NaOH solution | .09648 M | .09447 M |
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After that‚ room temperature water must also be added to the leveling bulb until the buret and the rubber tubing connecting the buret to the leveling bulb are filled. When filling up the leveling bulb‚ it must be placed near the top of the buret and should not be no more than half full‚ filled with water. Bubbles must be cleared from the tubing to eliminate possible errors. Once bubbles are cleared‚ the top of the buret must be connected to a 250 ml Erlenmeyer flask with a rubber tube and stopper and
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