In chemistry, what does Keq mean? Why is the bromine test performed? How do you determine the absorbance when you know the EC is 19,300 M^{-1} cm^{-1}? What are the limitations of thin-layer chromatography? Why is performing titration many times necessary?
What does the term mixture mean in chemistry? How many parts per million is the lower explosion limit for ethanol? Describe the circumstances in which the following processes could be used to separate the components of a mixture: dissolving of an impure substance...
Discover the benefits and applications of silica fume in concrete. Enhance strength and durability with this essential construction material.
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Essentially, back titration is a titration done in reverse. The person performing the titration does not titrate the original sample; instead, they add a known excess of standard reagent to the solution, with the excess then being titrated. Back titrations are useful if the reaction between the...
Sputtered films exhibit excellent uniformity, density, purity and adhesion. It is possible to produce alloys of precise composition with conventional sputtering, or oxides, nitrites and other compounds by reactive sputtering.Process of sputtering:
What does 'elements made up of atoms with the same number of protons' mean? What is associative law? What is the difference between oxidation state and valency? What's the importance of atom economy? Why are polyatomic ions not neutral? Do all atoms achieve octet when they bond?
in either a single dose or multiple doses; or the extent of absorption of the test pharmaceuticals or drug does not show a significant difference from the extent of absorption of the reference drug when administered at the same molar dose of the therapeutic ingredient under similar experimental ...
Three techniques—fire assay, wet chemistry, and instrumental analysis—are primarily used to analyze and determine the purity of metals. Assays are used to meet the delivery requirements for futures contracts. Metals Testing Assays quantitatively determine the amount of metal in a particular sample an...
An efficient HPLC method for the analysis of isomeric purity of technetium-99m-exametazime and identity confirmation using LC-MS The meso-isomer ( d, l-form) should not be present in a preparation as it is not retained in brain and thus does not provide clinically useful ... D Vanderghi...