The preanalytical phase includes a set of processes that are difficult to define because they take place in different places and at different times. Classically, the preanalytical phase included all processes from the time a laboratory request is made by a physician until the...
The International Union of Pure and Applied Chemistry (IUPAC) definition of adsorption is: "Adsorption vs. Absorption Adsorption is a surface phenomenon in which particles or molecules bind to the top layer of material. Absorption, on the other hand, goes deeper, involving the entire volume of t...
What is the definition of chemistry? What is the definition of effervescence in chemistry? Why are noble gases chemically inert? Is carbon-12 chemically active or inert? Define noble gases What does isoelectronic mean in chemistry? What is a reactive atom?
In chemistry, concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio ofsolutein a solution to eithersolventor totalsolution. Concentration is usually expressed in terms ofmassper unitvolume. However, the solute concentration may al...
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In pool chemistry, PPM (or its metric equivalent mg/L) is that standard. It tells us the amount–expressed as concentration (or density) in the water–of a given substance. Or, in the case of Total Alkalinity (TA), the sum of several substances. Traditional water chemistry ranges use ...
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Or else, that "colorless" did not mean what I would have thought. Thus far, the largest crystals of sodium chloride I have grown have only been maybe 8 mm3. (Grown by accident in a glass of salt water that evaporated.) Still, quite white. But, based on your replies, it sounds like...
By convention, “log” is taken to mean “log to base 10.” And remember, the “p” denotes a negative logarithm. So, at the risk of jumping ahead, a solution with a molar concentration of 10-7 protons has a pH of 7. If the negative sign wasn’t applied to the log function,...
Economics does not naturally lend itself to scientifichypothesis testingas does physics. In the field of epistemology, scientists can learn through logical thought experiments, also called deduction, or through empirical observation and testing, also called positivism. Geometry is a logically deductive sci...