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Why must the stem of the funnel touch the inside surface of the collecting beaker during filtration?
Ensuring the stem of the funnel touches the inside surface of the collecting beaker helps to prevent splashing or spillage of the liquid being filtered. It also helps to direct the filtered liquid smoothly into the beaker, minimizing the risk of contamination or loss of sample during the filtration process.
What are erlenmeyer flasks and florence flasks used for?
See the two Related Questions to the left for a description of each one. They are different in both shape and function.Florence flasks have round bottoms and no gradations indicating volume. Erlenmeyer flasks are conical in shape and have gradations depicting volume on the side.
Who discovered gelatinization?
The process of gelatinization was not discovered by a single person, but rather through experimentation and observation of how starches and certain grains changed when subjected to heat and moisture. The exact origins of this process are not definitively known.
When you use titration method with EDTA for Ca the result equals 4 ppm Ca but when you use flame photometer method for same sample the result equals 2 ppm Ca What is the reason?
Maybe the molar ratio of Ca to EDTA at equivalent titration is miscalculated: Not 2 Ca reacts with 1 EDTA (= tetra-acetate) but it is an equi-molar reaction: 1 Ca reacts with 1 EDTA.Not Ca2Edetate is formed, but rather CaH2Edetate (monocalcium dihydrogen ED-tetra acetate)If so the EDTA analysis outcome will be halved, so I would more trust on the FPM-outcome 2 ppmIf not, then I really don't know. Try a recalculation, succes.
Glucose is NOT made from?
Glucose is not made from fats, but rather from carbohydrates, specifically through the process of photosynthesis in plants or glycogenolysis in animals.
Why is a back titration sometimes used for an analysis rather than a direct titration?
Back titrations are used when a reaction occurring in the conical flask can not be detected using an indicator such as phenolphthalein. So, after this titration has been performed, the 'excess' is then titrated with something that can be detected more easily using phenolphthalein etc.
If you place iodine in a beaker of H2O will it float?
Iodine is denser than water, so it will sink in a beaker of water rather than float.
Why must the stem of the funnel touch the inside surface of the collecting beaker during filtration?
Ensuring the stem of the funnel touches the inside surface of the collecting beaker helps to prevent splashing or spillage of the liquid being filtered. It also helps to direct the filtered liquid smoothly into the beaker, minimizing the risk of contamination or loss of sample during the filtration process.
What are erlenmeyer flasks and florence flasks used for?
See the two Related Questions to the left for a description of each one. They are different in both shape and function.Florence flasks have round bottoms and no gradations indicating volume. Erlenmeyer flasks are conical in shape and have gradations depicting volume on the side.
Why must the stem of the funnel touches the inside surface of the collecting beaker during the filtration?
it's done to minimize the mixing of air into the filtered solution. By touching the stem to the collecting beaker, the solution flows into the beaker smoothly rather than splashing into it.
How do you describe the beaker?
A beaker is a cylindrical glass container with a flat bottom and a pouring lip. It is used in laboratories for measuring, mixing, and heating liquids. Beakers come in various sizes and are commonly marked with volume graduations.
What is the control variable in a titration lab?
The control variable in a titration lab is the volume and concentration of the titrant solution being used. Keeping these variables constant ensures that any changes observed in the reaction are due to the titrated solution being analyzed, rather than variations in the titrant solution.
Why cant the markings on conical flasks and beakers be used to correctly measure out volumes?
The characteristic of the attraction between water and glass (hydrophilia?) and the water's surface tension causes some of the water at the edges of the surface to partially climb the inside of the container, making it difficult to determine from the side where the water level actually is.
Is titration of thiosulfate is a direct or indirect iodine titration?
Indirect http://books.google.co.uk/books?id=wxMrnl9Hy0AC&pg=PA131&lpg=PA131&dq=iodine+indicator+in+alkaline+environment&source=web&ots=wGSsDuMEy3&sig=TasdtQD2-vRoFyq7pKt4-VeQ7wk&hl=en&sa=X&oi=book_result&resnum=8&ct=result#PPA130,M1
Do Liam and Carmen like each other in Tracy beaker returns?
In "Tracy Beaker Returns," Liam and Carmen do not have a romantic relationship. Their friendship is focused on supporting each other and being there for one another, rather than romantic feelings.
Why is an indicator not used in a redox titration?
In a redox titration, an indicator is not used because the endpoint is determined by a change in the oxidation state of the analyte or titrant, rather than a change in pH or color. The endpoint is typically detected using a potentiometric method, such as a redox electrode, which directly measures the change in voltage.
Informed consent should be a process rather than a one-time event?
should informed consent be a process rather than a one time event
