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- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/General_Chemistry_Labs/Colorimetric_Fe_Analysis_(Experiment)In the colorimetric analysis for Mn the concentration of the Mn is determined using the characteristic color of the permanganate ion.
- https://chem.libretexts.org/Ancillary_Materials/Demos_Techniques_and_Experiments/General_Lab_Techniques/Proper_Use_of_a_BuretThe volumetric analysis exercises will make use of a 50 mL buret.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Quantifying_Nature/Accuracy_of_Spectrophotometer_ReadingsThe needle deflection or the number shown on the digital display of a spectrophotometer is proportional to the transmittance of the solution. How do errors in transmittance readings affect the accurac...The needle deflection or the number shown on the digital display of a spectrophotometer is proportional to the transmittance of the solution. How do errors in transmittance readings affect the accuracy of solution concentration values?
- https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_and_Websites_(Inorganic_Chemistry)/Chemical_Reactions/Chemical_Reactions_Examples/Revealing_the_Dates_of_Buffalo_Nickels_(Demo)The date was placed on a raised area beneath the image of a native American; the date was usually the first thing to disappear as a Buffalo nickel wore down in people's pockets, purses and being handl...The date was placed on a raised area beneath the image of a native American; the date was usually the first thing to disappear as a Buffalo nickel wore down in people's pockets, purses and being handled in transactions. A buffalo nickel can be etched with vinegar so as to "develop" a latent image of the date of mint, owing presumably to the variable "etchability" of regions which had experienced high or low die pressures during the minting process.
- https://chem.libretexts.org/Ancillary_Materials/Demos_Techniques_and_Experiments/General_Lab_Techniques/Use_of_a_Volumetric_PipetVolumetric glassware is capable of measurements of volume that are good to four significant digits and is consequently expensive. You should be careful in handling this type of equipment so that break...Volumetric glassware is capable of measurements of volume that are good to four significant digits and is consequently expensive. You should be careful in handling this type of equipment so that breakage losses are minimized. Be particularly careful with the tips of pipets and burets.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/Analytical_Chemistry_Labs/Helpful_Hints_on_Colorimetric_Fe_AnalysisYour standard solution will develop a color like that shown in the image on the left. The final procedure in the experiment involves determining the iron concentration in tap water contributed by stud...Your standard solution will develop a color like that shown in the image on the left. The final procedure in the experiment involves determining the iron concentration in tap water contributed by students who have gathered samples from various locations. The color developed by a typical sample of tap water is shown in the image on the right. One question at the end of the experiment refers to brown tea made alternatively using tap water and distilled water.
- https://chem.libretexts.org/Ancillary_Materials/Demos_Techniques_and_Experiments/General_Lab_Techniques/Precipitation_from_a_Homogeneous_SolutionIf a precipitating agent is produced over a long period of time in a homogeneous solution the level of supersaturation remains low and compact crystal precipitates usually result instead of coagulated...If a precipitating agent is produced over a long period of time in a homogeneous solution the level of supersaturation remains low and compact crystal precipitates usually result instead of coagulated colloids. The resulting suspension of precipitate is compact, crystalline and easily filtered, whereas a precipitate formed by the addition of a precipitating agent is not easily filtered owing to a high level of relative supersaturation at the point where the reagent is added.
- https://chem.libretexts.org/Ancillary_Materials/Demos_Techniques_and_Experiments/General_Lab_Techniques/Calibration_of_a_BuretTo carry out this procedure you will require, in addition to a volumetric buret, two clean, dry 125 mL Erlenmeyer flasks and one #5 rubber stopper.
- https://chem.libretexts.org/Courses/BethuneCookman_University/B-CU%3A_CH-345_Quantitative_Analysis/CH345_Labs/Demonstrations_and_Techniques/General_Lab_Techniques/Proper_Use_of_a_BuretThe volumetric analysis exercises will make use of a 50 mL buret.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/General_Chemistry_Labs/The_Volumetric_Determination_of_Sodium_Carbonate_(Experiment)Note in the two photos below, the color of the solution on the left remains about the same just as the solution begins to boil, but the right image, taken a minute later definitely shows a darkening o...Note in the two photos below, the color of the solution on the left remains about the same just as the solution begins to boil, but the right image, taken a minute later definitely shows a darkening of the blue color. As you approach the final end point, continue to compare the color of the solution being titrated with the color of the blank.
- https://chem.libretexts.org/Ancillary_Materials/Laboratory_Experiments/Wet_Lab_Experiments/General_Chemistry_Labs/General_Chemistry_Labs/Complexometric_Calcium_Determination_(Experiment)Page notifications Off Share Seely.jpg Contributed by Oliver Seely Professor Emeritus (Chemistry) at California State University Dominguez Hills Table of contents Many metal ions form slightly diss...Page notifications Off Share Seely.jpg Contributed by Oliver Seely Professor Emeritus (Chemistry) at California State University Dominguez Hills Table of contents Many metal ions form slightly dissociated complex ions. The formation of these can serve as the basis of accurate and convenient titrations for such metal ions. Such determinations are referred to as complexometric titrations.
